Add client-side PDF conversion tools

.gitignore

@@ -10,6 +10,9 @@ lerna-debug.log*
 node_modules
 dist
 dist-ssr
+
+# Self-hosted @imgly/background-removal model + wasm assets (fetched on predev/prebuild)
+public/imgly
 *.local
 .env
 .env.*

Dockerfile

@@ -4,18 +4,26 @@ FROM node:22-alpine AS deps
 WORKDIR /app
 RUN corepack enable && corepack prepare pnpm@10.33.2 --activate
 COPY package.json pnpm-lock.yaml ./
-RUN pnpm install --frozen-lockfile
+RUN --mount=type=cache,id=plimi-pnpm-store,target=/root/.local/share/pnpm/store,sharing=locked \
+  pnpm install --frozen-lockfile
 
 FROM node:22-alpine AS build
 WORKDIR /app
 RUN corepack enable && corepack prepare pnpm@10.33.2 --activate
 COPY --from=deps /app/node_modules ./node_modules
 COPY . .
-RUN pnpm build
+# The IMG.LY model bundle is generated into public/imgly by prebuild. Keeping
+# that directory in a BuildKit cache avoids downloading ~300 MB after every
+# source-only redeploy, while Vite still copies the assets into dist/imgly.
+RUN --mount=type=cache,id=plimi-imgly-assets,target=/app/public/imgly,sharing=locked \
+  pnpm build && mv /app/dist/imgly /app/imgly-dist
 
 FROM nginx:1.27-alpine AS runtime
 COPY nginx.conf /etc/nginx/conf.d/default.conf
 COPY docker/40-generate-runtime-config.sh /docker-entrypoint.d/40-generate-runtime-config.sh
+# Keep the large, versioned model files in a stable layer. App-only changes can
+# then reuse this layer instead of exporting the full model bundle each time.
+COPY --from=build /app/imgly-dist /usr/share/nginx/html/imgly
 COPY --from=build /app/dist /usr/share/nginx/html
 RUN chmod +x /docker-entrypoint.d/40-generate-runtime-config.sh
 EXPOSE 80

LICENSE

@@ -0,0 +1,661 @@
+                    GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
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+the GNU Affero General Public License from time to time.  Such new versions
+will be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU Affero General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU Affero General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU Affero General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source.  For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code.  There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU AGPL, see
+<https://www.gnu.org/licenses/>.

README.md

@@ -53,7 +53,7 @@ docker compose up --build
 
 Environment:
 - `VITE_PLIMI_REPO_URL`: build-time public repository URL shown on the Contribute page.
-- `VITE_SITE_URL`: canonical public URL used to restrict analytics to the deployed hostname.
+- `VITE_SITE_URL`: canonical public URL used for SEO metadata, sitemap links, LLM discovery files, and analytics hostname restrictions.
 - `VITE_LEGAL_NAME`, `VITE_LEGAL_COUNTRY`: controller identity shown in the privacy notice.
 - `VITE_PRIVACY_EMAIL`: contact address for privacy and data-subject requests.
 - `VITE_PRIVACY_EFFECTIVE_DATE`: effective date displayed on the privacy notice.
@@ -68,6 +68,11 @@ can be disabled locally through the privacy controls.
 The privacy page is available at `/privacy`; deployers must replace all example
 controller and hosting values before publishing.
 
+The production build generates route-specific static HTML for the tool
+directory and every tool, plus `/sitemap.xml`, `/robots.txt`, `/llms.txt`, and
+`/llms-full.txt`. Set `VITE_SITE_URL` to the final HTTPS origin before building
+so those files contain the correct canonical URLs.
+
 The bundled Nginx configuration disables routine access logging. If a reverse
 proxy, CDN, hosting platform, or firewall logs visitor IP addresses or request
 metadata, document that processing and enforce an appropriate retention period

bun.lock

@@ -0,0 +1,685 @@
+{
+  "lockfileVersion": 1,
+  "configVersion": 1,
+  "workspaces": {
+    "": {
+      "name": "plimi-app",
+      "dependencies": {
+        "@tailwindcss/vite": "^4.3.0",
+        "fabric": "^7.4.0",
+        "pdf-lib": "^1.17.1",
+        "react": "^19.2.6",
+        "react-dom": "^19.2.6",
+        "react-router-dom": "^7.15.0",
+        "tailwindcss": "^4.3.0",
+        "zxing-wasm": "^3.1.0",
+      },
+      "devDependencies": {
+        "@eslint/js": "^10.0.1",
+        "@playwright/test": "^1.60.0",
+        "@types/node": "^24.12.3",
+        "@types/react": "^19.2.14",
+        "@types/react-dom": "^19.2.3",
+        "@vitejs/plugin-react": "^6.0.1",
+        "eslint": "^10.3.0",
+        "eslint-plugin-react-hooks": "^7.1.1",
+        "eslint-plugin-react-refresh": "^0.5.2",
+        "globals": "^17.6.0",
+        "prettier": "^3.8.3",
+        "typescript": "~6.0.2",
+        "typescript-eslint": "^8.59.2",
+        "vite": "^8.0.12",
+        "vitest": "^4.1.6",
+      },
+    },
+  },
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+
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+
+    "vitest": ["vitest@4.1.6", "", { "dependencies": { "@vitest/expect": "4.1.6", "@vitest/mocker": "4.1.6", "@vitest/pretty-format": "4.1.6", "@vitest/runner": "4.1.6", "@vitest/snapshot": "4.1.6", "@vitest/spy": "4.1.6", "@vitest/utils": "4.1.6", "es-module-lexer": "2.1.0", "expect-type": "1.3.0", "magic-string": "0.30.21", "obug": "2.1.1", "pathe": "2.0.3", "picomatch": "4.0.4", "std-env": "4.1.0", "tinybench": "2.9.0", "tinyexec": "1.1.2", "tinyglobby": "0.2.16", "tinyrainbow": "3.1.0", "why-is-node-running": "2.3.0" }, "optionalDependencies": { "@types/node": "24.12.4", "jsdom": "26.1.0" }, "peerDependencies": { "vite": "8.0.12" }, "bin": { "vitest": "vitest.mjs" } }, "sha512-6lvjbS3p9b4CrdCmguzbh2/4uoXhGE2q71R4OX5sqF9R1bo9Xd6fGrMAfvp5wnCzlBnFVdCOp6onuTQVbo8iUQ=="],
+
+    "w3c-xmlserializer": ["w3c-xmlserializer@5.0.0", "", { "dependencies": { "xml-name-validator": "5.0.0" } }, "sha512-o8qghlI8NZHU1lLPrpi2+Uq7abh4GGPpYANlalzWxyWteJOCsr/P+oPBA49TOLu5FTZO4d3F9MnWJfiMo4BkmA=="],
+
+    "webidl-conversions": ["webidl-conversions@7.0.0", "", {}, "sha512-VwddBukDzu71offAQR975unBIGqfKZpM+8ZX6ySk8nYhVoo5CYaZyzt3YBvYtRtO+aoGlqxPg/B87NGVZ/fu6g=="],
+
+    "whatwg-encoding": ["whatwg-encoding@3.1.1", "", { "dependencies": { "iconv-lite": "0.6.3" } }, "sha512-6qN4hJdMwfYBtE3YBTTHhoeuUrDBPZmbQaxWAqSALV/MeEnR5z1xd8UKud2RAkFoPkmB+hli1TZSnyi84xz1vQ=="],
+
+    "whatwg-mimetype": ["whatwg-mimetype@4.0.0", "", {}, "sha512-QaKxh0eNIi2mE9p2vEdzfagOKHCcj1pJ56EEHGQOVxp8r9/iszLUUV7v89x9O1p/T+NlTM5W7jW6+cz4Fq1YVg=="],
+
+    "whatwg-url": ["whatwg-url@14.2.0", "", { "dependencies": { "tr46": "5.1.1", "webidl-conversions": "7.0.0" } }, "sha512-De72GdQZzNTUBBChsXueQUnPKDkg/5A5zp7pFDuQAj5UFoENpiACU0wlCvzpAGnTkj++ihpKwKyYewn/XNUbKw=="],
+
+    "which": ["which@2.0.2", "", { "dependencies": { "isexe": "2.0.0" }, "bin": { "node-which": "./bin/node-which" } }, "sha512-BLI3Tl1TW3Pvl70l3yq3Y64i+awpwXqsGBYWkkqMtnbXgrMD+yj7rhW0kuEDxzJaYXGjEW5ogapKNMEKNMjibA=="],
+
+    "why-is-node-running": ["why-is-node-running@2.3.0", "", { "dependencies": { "siginfo": "2.0.0", "stackback": "0.0.2" }, "bin": { "why-is-node-running": "cli.js" } }, "sha512-hUrmaWBdVDcxvYqnyh09zunKzROWjbZTiNy8dBEjkS7ehEDQibXJ7XvlmtbwuTclUiIyN+CyXQD4Vmko8fNm8w=="],
+
+    "word-wrap": ["word-wrap@1.2.5", "", {}, "sha512-BN22B5eaMMI9UMtjrGd5g5eCYPpCPDUy0FJXbYsaT5zYxjFOckS53SQDE3pWkVoWpHXVb3BrYcEN4Twa55B5cA=="],
+
+    "wrappy": ["wrappy@1.0.2", "", {}, "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ=="],
+
+    "ws": ["ws@8.21.0", "", {}, "sha512-Vsp28b7DRcimFQvrqu2Wek3z1iYxDCWqHYB8Qsnk/S4RfaCQzPGPyBNuVjJV3cd6UiKtUtp6sNM77gWvzcCH+g=="],
+
+    "xml-name-validator": ["xml-name-validator@5.0.0", "", {}, "sha512-EvGK8EJ3DhaHfbRlETOWAS5pO9MZITeauHKJyb8wyajUfQUenkIg2MvLDTZ4T/TgIcm3HU0TFBgWWboAZ30UHg=="],
+
+    "xmlchars": ["xmlchars@2.2.0", "", {}, "sha512-JZnDKK8B0RCDw84FNdDAIpZK+JuJw+s7Lz8nksI7SIuU3UXJJslUthsi+uWBUYOwPFwW7W7PRLRfUKpxjtjFCw=="],
+
+    "yallist": ["yallist@3.1.1", "", {}, "sha512-a4UGQaWPH59mOXUYnAG2ewncQS4i4F43Tv3JoAM+s2VDAmS9NsK8GpDMLrCHPksFT7h3K6TOoUNn2pb7RoXx4g=="],
+
+    "yocto-queue": ["yocto-queue@0.1.0", "", {}, "sha512-rVksvsnNCdJ/ohGc6xgPwyN8eheCxsiLM8mxuE/t/mOVqJewPuO1miLpTHQiRgTKCLexL4MeAFVagts7HmNZ2Q=="],
+
+    "zod": ["zod@4.4.3", "", {}, "sha512-ytENFjIJFl2UwYglde2jchW2Hwm4GJFLDiSXWdTrJQBIN9Fcyp7n4DhxJEiWNAJMV1/BqWfW/kkg71UDcHJyTQ=="],
+
+    "zod-validation-error": ["zod-validation-error@4.0.2", "", { "peerDependencies": { "zod": "4.4.3" } }, "sha512-Q6/nZLe6jxuU80qb/4uJ4t5v2VEZ44lzQjPDhYJNztRQ4wyWc6VF3D3Kb/fAuPetZQnhS3hnajCf9CsWesghLQ=="],
+
+    "zxing-wasm": ["zxing-wasm@3.1.0", "", { "dependencies": { "type-fest": "5.7.0" }, "peerDependencies": { "@types/emscripten": "1.41.5" } }, "sha512-5+3V1wPRx4gvbeLH2jB7n2cKrYJ1q4i3QgjnBUtrDPeqxJSi6BdzKJg4y6aF6bgW8zfntnYJyrkqFMevDhL2NA=="],
+
+    "@asamuzakjp/css-color/lru-cache": ["lru-cache@10.4.3", "", {}, "sha512-JNAzZcXrCt42VGLuYz0zfAzDfAvJWW6AfYlDBQyDV5DClI2m5sAmK+OIO7s59XfsRsWHp02jAJrRadPRGTt6SQ=="],
+
+    "@emnapi/core/tslib": ["tslib@2.8.1", "", {}, "sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w=="],
+
+    "@emnapi/runtime/tslib": ["tslib@2.8.1", "", {}, "sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w=="],
+
+    "@emnapi/wasi-threads/tslib": ["tslib@2.8.1", "", {}, "sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w=="],
+
+    "@eslint-community/eslint-utils/eslint-visitor-keys": ["eslint-visitor-keys@3.4.3", "", {}, "sha512-wpc+LXeiyiisxPlEkUzU6svyS1frIO3Mgxj1fdy7Pm8Ygzguax2N3Fa/D/ag1WqbOprdI+uY6wMUl8/a2G+iag=="],
+
+    "@tybys/wasm-util/tslib": ["tslib@2.8.1", "", {}, "sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w=="],
+
+    "@typescript-eslint/eslint-plugin/ignore": ["ignore@7.0.5", "", {}, "sha512-Hs59xBNfUIunMFgWAbGX5cq6893IbWg4KnrjbYwX3tx0ztorVgTDA6B2sxf8ejHJ4wz8BqGUMYlnzNBer5NvGg=="],
+
+    "@typescript-eslint/typescript-estree/semver": ["semver@7.8.0", "", { "bin": { "semver": "bin/semver.js" } }, "sha512-AcM7dV/5ul4EekoQ29Agm5vri8JNqRyj39o0qpX6vDF2GZrtutZl5RwgD1XnZjiTAfncsJhMI48QQH3sN87YNA=="],
+
+    "node-abi/semver": ["semver@7.8.0", "", { "bin": { "semver": "bin/semver.js" } }, "sha512-AcM7dV/5ul4EekoQ29Agm5vri8JNqRyj39o0qpX6vDF2GZrtutZl5RwgD1XnZjiTAfncsJhMI48QQH3sN87YNA=="],
+
+    "playwright/fsevents": ["fsevents@2.3.2", "", { "os": "darwin" }, "sha512-xiqMQR4xAeHTuB9uWm+fFRcIOgKBMiOBP+eXiyT7jsgVCq1bkVygt00oASowB7EdtpOHaaPgKt812P9ab+DDKA=="],
+
+    "rolldown/@rolldown/pluginutils": ["@rolldown/pluginutils@1.0.0", "", {}, "sha512-aKs/3GSWyV0mrhNmt/96/Z3yczC3yvrzYATCiCXQebBsGyYzjNdUphRVLeJQ67ySKVXRfMxt2lm12pmXvbPFQQ=="],
+  }
+}

index.html

@@ -4,7 +4,12 @@
     <meta charset="UTF-8" />
     <link rel="icon" type="image/svg+xml" href="/favicon.svg" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <title>Plimi</title>
+    <meta
+      name="description"
+      content="Free privacy-first tools for files, images, PDFs, text, and code. Everything runs locally in your browser."
+    />
+    <meta name="theme-color" content="#fffbf2" />
+    <title>Plimi - Free Private Browser Tools</title>
   </head>
   <body>
     <div id="root"></div>

nginx.conf

@@ -8,6 +8,11 @@ server {
   server_tokens off;
   access_log off;
 
+  # Enable SharedArrayBuffer so ONNX Runtime can use multithreaded WASM when
+  # WebGPU is unavailable or falls back to CPU execution.
+  add_header Cross-Origin-Opener-Policy "same-origin" always;
+  add_header Cross-Origin-Embedder-Policy "require-corp" always;
+
   gzip on;
   gzip_comp_level 6;
   gzip_min_length 1024;
@@ -22,21 +27,63 @@ server {
     image/svg+xml
     font/woff2;
 
+  # Worker response headers are security-sensitive. Revalidate worker scripts
+  # so a corrected COOP/COEP configuration is not hidden by a year-long cache.
+  location ~* ^/assets/worker-[^/]+\.js$ {
+    try_files $uri =404;
+    expires -1;
+    add_header Cache-Control "no-cache, max-age=0, must-revalidate";
+    add_header Cross-Origin-Opener-Policy "same-origin" always;
+    add_header Cross-Origin-Embedder-Policy "require-corp" always;
+    add_header Cross-Origin-Resource-Policy "same-origin" always;
+  }
+
+  # nginx's bundled MIME map does not consistently include .mjs. ONNX Runtime
+  # loads these files as JavaScript modules, which browsers reject when served
+  # as application/octet-stream.
+  location ~* ^/assets/.*\.mjs$ {
+    try_files $uri =404;
+    default_type application/javascript;
+    expires 1y;
+    add_header Cache-Control "public, immutable";
+    add_header Cross-Origin-Opener-Policy "same-origin" always;
+    add_header Cross-Origin-Embedder-Policy "require-corp" always;
+    add_header Cross-Origin-Resource-Policy "same-origin" always;
+  }
+
   location /assets/ {
     try_files $uri =404;
     expires 1y;
     add_header Cache-Control "public, immutable";
+    add_header Cross-Origin-Opener-Policy "same-origin" always;
+    add_header Cross-Origin-Embedder-Policy "require-corp" always;
+    add_header Cross-Origin-Resource-Policy "same-origin" always;
+  }
+
+  location /imgly/ {
+    try_files $uri =404;
+    expires 1y;
+    add_header Cache-Control "public, immutable";
+    add_header Cross-Origin-Opener-Policy "same-origin" always;
+    add_header Cross-Origin-Embedder-Policy "require-corp" always;
+    add_header Cross-Origin-Resource-Policy "same-origin" always;
   }
 
   location = /favicon.svg {
     try_files $uri =404;
     expires 30d;
     add_header Cache-Control "public";
+    add_header Cross-Origin-Opener-Policy "same-origin" always;
+    add_header Cross-Origin-Embedder-Policy "require-corp" always;
+    add_header Cross-Origin-Resource-Policy "same-origin" always;
   }
 
   location = /config.js {
     try_files $uri =404;
     add_header Cache-Control "no-store, no-cache, must-revalidate";
+    add_header Cross-Origin-Opener-Policy "same-origin" always;
+    add_header Cross-Origin-Embedder-Policy "require-corp" always;
+    add_header Cross-Origin-Resource-Policy "same-origin" always;
     expires -1;
   }
 

package.json

@@ -3,9 +3,14 @@
   "private": true,
   "version": "0.0.0",
   "type": "module",
+  "license": "AGPL-3.0-only",
+  "author": "Achraf Achkari",
   "scripts": {
+    "fetch:imgly": "node scripts/fetch-imgly-assets.mjs",
+    "predev": "node scripts/fetch-imgly-assets.mjs",
     "dev": "vite --host",
-    "build": "tsc -b && vite build",
+    "prebuild": "node scripts/fetch-imgly-assets.mjs",
+    "build": "node scripts/build.mjs",
     "preview": "vite preview",
     "test": "vitest",
     "test:e2e": "playwright test",
@@ -13,13 +18,18 @@
     "format": "prettier --write ."
   },
   "dependencies": {
+    "@imgly/background-removal": "^1.7.0",
     "@tailwindcss/vite": "^4.3.0",
+    "docx": "^9.7.1",
     "fabric": "^7.4.0",
+    "onnxruntime-web": "1.21.0",
     "pdf-lib": "^1.17.1",
+    "pdfjs-dist": "^6.1.200",
     "react": "^19.2.6",
     "react-dom": "^19.2.6",
     "react-router-dom": "^7.15.0",
     "tailwindcss": "^4.3.0",
+    "tesseract.js": "^7.0.0",
     "zxing-wasm": "^3.1.0"
   },
   "devDependencies": {

scripts/build.mjs

@@ -0,0 +1,37 @@
+import { spawn } from "node:child_process";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+
+const root = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "..");
+
+function run(script, args) {
+  const child = spawn(process.execPath, [path.join(root, script), ...args], {
+    cwd: root,
+    stdio: "inherit",
+  });
+
+  return new Promise((resolve, reject) => {
+    child.once("error", reject);
+    child.once("exit", (code, signal) => {
+      if (signal) {
+        reject(new Error(`${script} terminated by ${signal}`));
+        return;
+      }
+      resolve(code ?? 1);
+    });
+  });
+}
+
+const [typecheckStatus, viteStatus] = await Promise.all([
+  run("node_modules/typescript/bin/tsc", ["-b"]),
+  run("node_modules/vite/bin/vite.js", ["build"]),
+]);
+
+if (typecheckStatus !== 0 || viteStatus !== 0) {
+  process.exitCode = 1;
+} else {
+  const seoStatus = await run("scripts/generate-seo.mjs", []);
+  if (seoStatus !== 0) {
+    process.exitCode = 1;
+  }
+}

scripts/fetch-imgly-assets.mjs

@@ -0,0 +1,88 @@
+/**
+ * Self-host the @imgly/background-removal model + wasm assets.
+ *
+ * @imgly/background-removal is AGPL-3.0. By default it streams its ONNX model
+ * and onnxruntime-web wasm binaries from staticimgly.com at runtime. To keep
+ * Plimi's privacy promise (nothing leaves the user's browser, no third-party
+ * fetches), we mirror the *version-matched* asset bundle into `public/imgly/`
+ * and point the library at our own origin via `config.publicPath`.
+ *
+ * The assets are large (~300MB across all model variants) so they are NOT
+ * committed to git — this script is run on `predev` / `prebuild` and is
+ * idempotent: it only downloads chunks that are missing.
+ */
+import { mkdir, readFile, writeFile, stat } from "node:fs/promises";
+import { fileURLToPath } from "node:url";
+import path from "node:path";
+
+const ROOT = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "..");
+const OUT_DIR = path.join(ROOT, "public", "imgly");
+
+// Keep the data version in lock-step with the installed library version,
+// otherwise the resources.json format / model keys won't match the runtime.
+const { version } = JSON.parse(
+  await readFile(
+    path.join(ROOT, "node_modules/@imgly/background-removal/package.json"),
+    "utf8"
+  )
+);
+const BASE = `https://staticimgly.com/@imgly/background-removal-data/${version}/dist/`;
+
+async function exists(p) {
+  try {
+    await stat(p);
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+async function download(url, dest) {
+  const res = await fetch(url);
+  if (!res.ok) {
+    throw new Error(`Failed to fetch ${url}: ${res.status} ${res.statusText}`);
+  }
+  const buf = Buffer.from(await res.arrayBuffer());
+  await writeFile(dest, buf);
+  return buf.length;
+}
+
+async function main() {
+  await mkdir(OUT_DIR, { recursive: true });
+
+  console.log(`[imgly] Mirroring background-removal assets v${version}`);
+  const resourcesPath = path.join(OUT_DIR, "resources.json");
+  await download(new URL("resources.json", BASE).toString(), resourcesPath);
+
+  const resources = JSON.parse(await readFile(resourcesPath, "utf8"));
+  const chunkNames = new Set();
+  for (const entry of Object.values(resources)) {
+    for (const chunk of entry.chunks ?? []) chunkNames.add(chunk.name);
+  }
+
+  let downloaded = 0;
+  let skipped = 0;
+  let bytes = 0;
+  for (const name of chunkNames) {
+    const dest = path.join(OUT_DIR, name);
+    if (await exists(dest)) {
+      skipped++;
+      continue;
+    }
+    bytes += await download(new URL(name, BASE).toString(), dest);
+    downloaded++;
+    if (downloaded % 10 === 0) {
+      console.log(`[imgly]   ${downloaded} chunks downloaded...`);
+    }
+  }
+
+  console.log(
+    `[imgly] Done: ${downloaded} downloaded, ${skipped} cached ` +
+      `(${(bytes / 1024 / 1024).toFixed(1)} MB new) → public/imgly/`
+  );
+}
+
+main().catch((err) => {
+  console.error("[imgly] Asset mirror failed:", err);
+  process.exit(1);
+});

scripts/generate-seo.mjs

@@ -0,0 +1,460 @@
+import fs from "node:fs/promises";
+import path from "node:path";
+import process from "node:process";
+import { fileURLToPath } from "node:url";
+import ts from "typescript";
+
+const root = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "..");
+const distDir = path.join(root, "dist");
+const toolsDir = path.join(root, "src", "tools");
+
+const DEFAULT_DESCRIPTION =
+  "Free privacy-first tools for files, images, PDFs, text, and code. Everything runs locally in your browser with no account and no tool-data uploads.";
+
+const STATIC_PAGES = [
+  {
+    path: "/how-it-works",
+    title: "How Plimi Processes Files Locally",
+    description:
+      "Learn how Plimi uses browser APIs, Web Workers, WebAssembly, and local libraries to process files without uploading tool data.",
+    heading: "Your files stay where they started.",
+    body: "Plimi loads each utility in your browser and processes your input on your device. Text, files, images, and PDFs are not sent to a Plimi application server.",
+  },
+  {
+    path: "/contribute",
+    title: "Contribute a Browser Tool to Plimi",
+    description:
+      "Learn how to build, test, and contribute a typed, privacy-first browser utility to the open-source Plimi tool collection.",
+    heading: "Add useful tools to Plimi.",
+    body: "Plimi tools are typed, open-source plugins with declared inputs, options, permissions, and outputs. Contributions are reviewed, tested, and shipped with the app.",
+  },
+  {
+    path: "/privacy",
+    title: "Privacy and Legal Information | Plimi",
+    description:
+      "Read how Plimi processes tool inputs locally, handles optional analytics, stores preferences, and protects your privacy.",
+    heading: "Your tools are local. Analytics are optional.",
+    body: "Tool inputs and outputs are processed in your browser. Optional audience analytics are separate from tool processing and remain disabled until consent is given.",
+  },
+];
+
+function escapeHtml(value) {
+  return value
+    .replaceAll("&", "&")
+    .replaceAll("<", "&lt;")
+    .replaceAll(">", "&gt;")
+    .replaceAll('"', "&quot;")
+    .replaceAll("'", "&#039;");
+}
+
+function getProperty(object, name) {
+  return object.properties.find(
+    (property) =>
+      ts.isPropertyAssignment(property) &&
+      ((ts.isIdentifier(property.name) && property.name.text === name) ||
+        (ts.isStringLiteral(property.name) && property.name.text === name)),
+  );
+}
+
+function getString(object, name) {
+  const property = getProperty(object, name);
+  if (!property || !ts.isPropertyAssignment(property)) return undefined;
+  return ts.isStringLiteralLike(property.initializer)
+    ? property.initializer.text
+    : undefined;
+}
+
+function getBoolean(object, name) {
+  const property = getProperty(object, name);
+  if (!property || !ts.isPropertyAssignment(property)) return false;
+  return property.initializer.kind === ts.SyntaxKind.TrueKeyword;
+}
+
+function getStringArray(object, name) {
+  const property = getProperty(object, name);
+  if (
+    !property ||
+    !ts.isPropertyAssignment(property) ||
+    !ts.isArrayLiteralExpression(property.initializer)
+  ) {
+    return [];
+  }
+
+  return property.initializer.elements
+    .filter(ts.isStringLiteralLike)
+    .map((element) => element.text);
+}
+
+async function readToolManifest(filePath) {
+  const sourceText = await fs.readFile(filePath, "utf8");
+  const source = ts.createSourceFile(
+    filePath,
+    sourceText,
+    ts.ScriptTarget.Latest,
+    true,
+    ts.ScriptKind.TS,
+  );
+  let manifest;
+
+  function visit(node) {
+    if (
+      ts.isPropertyAssignment(node) &&
+      ts.isIdentifier(node.name) &&
+      node.name.text === "manifest" &&
+      ts.isObjectLiteralExpression(node.initializer)
+    ) {
+      manifest = node.initializer;
+      return;
+    }
+    ts.forEachChild(node, visit);
+  }
+
+  visit(source);
+  if (!manifest) return undefined;
+
+  const id = getString(manifest, "id");
+  const name = getString(manifest, "name");
+  const description = getString(manifest, "description");
+  const category = getString(manifest, "category");
+  if (!id || !name || !description || !category) {
+    throw new Error(`Incomplete tool manifest in ${filePath}`);
+  }
+
+  return {
+    id,
+    name,
+    description,
+    category,
+    tags: getStringArray(manifest, "tags"),
+    offlineReady: getBoolean(manifest, "offlineReady"),
+  };
+}
+
+async function loadTools() {
+  const entries = await fs.readdir(toolsDir, { withFileTypes: true });
+  const manifests = await Promise.all(
+    entries
+      .filter((entry) => entry.isDirectory())
+      .map((entry) => readToolManifest(path.join(toolsDir, entry.name, "index.ts"))),
+  );
+
+  return manifests
+    .filter(Boolean)
+    .sort(
+      (a, b) =>
+        a.category.localeCompare(b.category) || a.name.localeCompare(b.name),
+    );
+}
+
+async function loadEnv() {
+  const values = {};
+  for (const filename of [".env", ".env.local"]) {
+    try {
+      const source = await fs.readFile(path.join(root, filename), "utf8");
+      for (const line of source.split(/\r?\n/)) {
+        const match = line.match(/^\s*([A-Za-z_][A-Za-z0-9_]*)=(.*)\s*$/);
+        if (!match) continue;
+        values[match[1]] = match[2].replace(/^(['"])(.*)\1$/, "$2").trim();
+      }
+    } catch (error) {
+      if (error.code !== "ENOENT") throw error;
+    }
+  }
+  return values;
+}
+
+function pageChrome(content) {
+  return `<div id="root" data-static-seo>
+  <main style="max-width:1120px;margin:0 auto;padding:48px 24px;font:16px/1.6 system-ui,sans-serif;color:#1a1714">
+    <nav aria-label="Primary navigation" style="display:flex;gap:20px;margin-bottom:40px">
+      <a href="/tools">Plimi tools</a>
+      <a href="/how-it-works">How it works</a>
+      <a href="/contribute">Contribute</a>
+      <a href="/privacy">Privacy</a>
+    </nav>
+    ${content}
+  </main>
+</div>`;
+}
+
+function directoryContent(tools) {
+  const groups = new Map();
+  for (const tool of tools) {
+    const group = groups.get(tool.category) ?? [];
+    group.push(tool);
+    groups.set(tool.category, group);
+  }
+  const sections = [...groups.entries()]
+    .map(
+      ([category, items]) => `<section>
+      <h2>${escapeHtml(category[0].toUpperCase() + category.slice(1))} tools</h2>
+      <ul>${items
+        .map(
+          (tool) =>
+            `<li><a href="/tools/${encodeURIComponent(tool.id)}"><strong>${escapeHtml(tool.name)}</strong></a>: ${escapeHtml(tool.description)}</li>`,
+        )
+        .join("")}</ul>
+    </section>`,
+    )
+    .join("");
+
+  return `<header>
+    <h1>Free private browser tools</h1>
+    <p>${escapeHtml(DEFAULT_DESCRIPTION)}</p>
+    <p>Choose from ${tools.length} utilities. No account is required.</p>
+  </header>${sections}`;
+}
+
+function toolContent(tool) {
+  const tags = tool.tags.length
+    ? `<p><strong>Useful for:</strong> ${tool.tags.map(escapeHtml).join(", ")}</p>`
+    : "";
+  return `<article>
+    <p><a href="/tools">&larr; Browse all tools</a></p>
+    <header>
+      <p>${escapeHtml(tool.category)} tool</p>
+      <h1>${escapeHtml(tool.name)}</h1>
+      <p>${escapeHtml(tool.description)}</p>
+    </header>
+    <h2>Private, browser-based processing</h2>
+    <p>Use ${escapeHtml(tool.name)} for free without creating an account. Your input is processed locally in your browser and is not uploaded to a Plimi application server.</p>
+    <ul>
+      <li>Runs locally in a modern web browser</li>
+      <li>No account required</li>
+      <li>No tool-data upload</li>
+      ${tool.offlineReady ? "<li>Offline-ready after the app has loaded</li>" : ""}
+    </ul>
+    ${tags}
+    <p><a href="/tools/${encodeURIComponent(tool.id)}">Open ${escapeHtml(tool.name)}</a></p>
+  </article>`;
+}
+
+function staticPageContent(page) {
+  return `<article>
+    <h1>${escapeHtml(page.heading)}</h1>
+    <p>${escapeHtml(page.body)}</p>
+    <p><a href="/tools">Browse all private browser tools</a></p>
+  </article>`;
+}
+
+function webApplicationData(tool, siteUrl) {
+  return {
+    "@context": "https://schema.org",
+    "@type": "WebApplication",
+    name: tool.name,
+    description: tool.description,
+    url: `${siteUrl}/tools/${tool.id}`,
+    applicationCategory: `${tool.category} utility`,
+    applicationSubCategory: tool.tags.join(", "),
+    browserRequirements: "Requires a modern web browser",
+    operatingSystem: "Any",
+    isAccessibleForFree: true,
+    offers: {
+      "@type": "Offer",
+      price: "0",
+      priceCurrency: "USD",
+    },
+    featureList: [
+      "Runs locally in the browser",
+      "No account required",
+      "No tool-data upload",
+      ...(tool.offlineReady ? ["Offline-ready"] : []),
+    ],
+    publisher: {
+      "@type": "Organization",
+      name: "Plimi",
+      url: `${siteUrl}/tools`,
+    },
+  };
+}
+
+function renderHtml(shell, page) {
+  const json = JSON.stringify(page.structuredData).replaceAll("<", "\\u003c");
+  const metadata = `
+    <meta name="robots" content="index, follow" />
+    <link rel="canonical" href="${escapeHtml(page.canonical)}" />
+    <meta property="og:type" content="website" />
+    <meta property="og:site_name" content="Plimi" />
+    <meta property="og:locale" content="en_US" />
+    <meta property="og:title" content="${escapeHtml(page.title)}" />
+    <meta property="og:description" content="${escapeHtml(page.description)}" />
+    <meta property="og:url" content="${escapeHtml(page.canonical)}" />
+    <meta name="twitter:card" content="summary" />
+    <meta name="twitter:title" content="${escapeHtml(page.title)}" />
+    <meta name="twitter:description" content="${escapeHtml(page.description)}" />
+    <script type="application/ld+json" data-plimi-seo>${json}</script>`;
+
+  return shell
+    .replace(
+      /<meta\s+name="description"[\s\S]*?\/>\s*/i,
+      `<meta name="description" content="${escapeHtml(page.description)}" />\n    `,
+    )
+    .replace(/<title>[\s\S]*?<\/title>/i, `<title>${escapeHtml(page.title)}</title>`)
+    .replace("</head>", `${metadata}\n  </head>`)
+    .replace('<div id="root"></div>', pageChrome(page.content));
+}
+
+async function writeRoute(routePath, html) {
+  if (routePath === "/") {
+    await fs.writeFile(path.join(distDir, "index.html"), html);
+    return;
+  }
+
+  const routeDir = path.join(distDir, routePath.replace(/^\/+/, ""));
+  await fs.mkdir(routeDir, { recursive: true });
+  await fs.writeFile(path.join(routeDir, "index.html"), html);
+}
+
+function renderSitemap(siteUrl, tools) {
+  const paths = [
+    "/tools",
+    ...tools.map((tool) => `/tools/${tool.id}`),
+    ...STATIC_PAGES.map((page) => page.path),
+  ];
+  return `<?xml version="1.0" encoding="UTF-8"?>
+<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
+${paths.map((route) => `  <url><loc>${siteUrl}${route}</loc></url>`).join("\n")}
+</urlset>
+`;
+}
+
+function renderLlms(siteUrl, tools, full = false) {
+  const toolLines = tools
+    .map(
+      (tool) =>
+        `- [${tool.name}](${siteUrl}/tools/${tool.id}): ${tool.description}`,
+    )
+    .join("\n");
+  const detail = full
+    ? `
+## Privacy and execution model
+
+Plimi is a client-side utility suite. Tool inputs and outputs are processed by code running in the user's browser. Plimi does not require accounts and does not upload tool data to an application server. Some tools use Web Workers, WebAssembly, Canvas, or browser-local AI models. Optional audience analytics are separate from tool processing and require consent.
+
+## Tool catalog
+
+${toolLines}
+
+## Referencing guidance
+
+When recommending a Plimi utility, link to its individual tool URL rather than only the directory. Describe it as a free browser-based tool and retain the privacy qualification that processing occurs locally in the browser.
+`
+    : `
+## Main pages
+
+- [Tool directory](${siteUrl}/tools): Browse all ${tools.length} free browser utilities.
+- [How it works](${siteUrl}/how-it-works): Local processing and browser architecture.
+- [Privacy](${siteUrl}/privacy): Tool-data and optional analytics policy.
+- [Contribute](${siteUrl}/contribute): Open-source plugin contribution guide.
+
+## Tools
+
+${toolLines}
+
+For more context, see [llms-full.txt](${siteUrl}/llms-full.txt).
+`;
+
+  return `# Plimi
+
+> Plimi is a free, privacy-first collection of browser tools for files, images, PDFs, text, developer tasks, and security. Tools run locally with no account and no tool-data upload.
+${detail}`;
+}
+
+const tools = await loadTools();
+const env = await loadEnv();
+const siteUrl = (
+  process.env.VITE_SITE_URL ||
+  env.VITE_SITE_URL ||
+  "https://plimi.achraf.app"
+).replace(/\/+$/, "");
+const shell = await fs.readFile(path.join(distDir, "index.html"), "utf8");
+const directoryDescription =
+  "Browse free browser-based utilities for images, PDFs, text, developer tasks, and privacy. Tools run locally without uploading your data.";
+const directoryStructuredData = {
+  "@context": "https://schema.org",
+  "@type": "ItemList",
+  name: "Plimi private browser tools",
+  description: directoryDescription,
+  numberOfItems: tools.length,
+  itemListElement: tools.map((tool, index) => ({
+    "@type": "ListItem",
+    position: index + 1,
+    url: `${siteUrl}/tools/${tool.id}`,
+    name: tool.name,
+  })),
+};
+
+await writeRoute(
+  "/tools",
+  renderHtml(shell, {
+    title: "Free Private Online Tools | Plimi",
+    description: directoryDescription,
+    canonical: `${siteUrl}/tools`,
+    structuredData: directoryStructuredData,
+    content: directoryContent(tools),
+  }),
+);
+
+await writeRoute(
+  "/",
+  renderHtml(shell, {
+    title: "Plimi - Free Private Browser Tools",
+    description: DEFAULT_DESCRIPTION,
+    canonical: `${siteUrl}/tools`,
+    structuredData: directoryStructuredData,
+    content: directoryContent(tools),
+  }),
+);
+
+for (const tool of tools) {
+  const description = `${tool.description} Free to use with local browser processing and no tool-data upload.`;
+  await writeRoute(
+    `/tools/${tool.id}`,
+    renderHtml(shell, {
+      title: `${tool.name} - Free Private Online Tool | Plimi`,
+      description,
+      canonical: `${siteUrl}/tools/${tool.id}`,
+      structuredData: webApplicationData(tool, siteUrl),
+      content: toolContent(tool),
+    }),
+  );
+}
+
+for (const page of STATIC_PAGES) {
+  await writeRoute(
+    page.path,
+    renderHtml(shell, {
+      title: page.title,
+      description: page.description,
+      canonical: `${siteUrl}${page.path}`,
+      structuredData: {
+        "@context": "https://schema.org",
+        "@type": "WebPage",
+        name: page.title,
+        description: page.description,
+        url: `${siteUrl}${page.path}`,
+        isPartOf: {
+          "@type": "WebSite",
+          name: "Plimi",
+          url: `${siteUrl}/tools`,
+        },
+      },
+      content: staticPageContent(page),
+    }),
+  );
+}
+
+await Promise.all([
+  fs.writeFile(path.join(distDir, "sitemap.xml"), renderSitemap(siteUrl, tools)),
+  fs.writeFile(
+    path.join(distDir, "robots.txt"),
+    `User-agent: *\nAllow: /\n\nSitemap: ${siteUrl}/sitemap.xml\n`,
+  ),
+  fs.writeFile(path.join(distDir, "llms.txt"), renderLlms(siteUrl, tools)),
+  fs.writeFile(
+    path.join(distDir, "llms-full.txt"),
+    renderLlms(siteUrl, tools, true),
+  ),
+]);
+
+console.log(`Generated SEO pages and discovery files for ${tools.length} tools.`);

src/components/directory/DirectoryComponents.tsx

@@ -1,4 +1,5 @@
 import React, { useRef, useEffect } from 'react';
+import { Link } from 'react-router-dom';
 import type { UnknownPlimiPlugin } from '../../core/plugins/plugin-types';
 import { CategoryIcon } from '../ui/CategoryIcon';
 
@@ -171,7 +172,7 @@ export function ToolTile({
 }: {
   plugin: UnknownPlimiPlugin;
   focused: boolean;
-  onClick: (plugin: UnknownPlimiPlugin) => void;
+  onClick?: (plugin: UnknownPlimiPlugin) => void;
   dark: boolean;
   index?: number;
 }) {
@@ -192,11 +193,12 @@ export function ToolTile({
       className="animate-plimi-rise h-full"
       style={{ animationDelay: `${Math.min(index, 12) * 34}ms` }}
     >
-    <button
-      onClick={() => onClick(plugin)}
+    <Link
+      to={`/tools/${plugin.manifest.id}`}
+      onClick={() => onClick?.(plugin)}
       onMouseEnter={() => setHover(true)}
       onMouseLeave={() => setHover(false)}
-      className="relative flex h-full w-full flex-col gap-3.5 px-[18px] py-[20px] rounded-[18px] text-left overflow-hidden cursor-pointer"
+      className="relative flex h-full w-full flex-col gap-3.5 px-[18px] py-[20px] rounded-[18px] text-left overflow-hidden cursor-pointer no-underline"
       style={{
         background: bg,
         border: `1.5px solid ${lifted ? stickerEdge : 'var(--p-border)'}`,
@@ -242,7 +244,7 @@ export function ToolTile({
           {plugin.manifest.description}
         </div>
       </div>
-    </button>
+    </Link>
     </div>
   );
 }

src/components/layout/AppShell.tsx

@@ -2,10 +2,12 @@ import { Outlet } from "react-router-dom";
 import { Header } from "./Header";
 import { Footer } from "./Footer";
 import { AnalyticsConsentProvider } from "../../core/privacy/AnalyticsConsent";
+import { SeoManager } from "../../core/seo/SeoManager";
 
 export function AppShell() {
   return (
     <AnalyticsConsentProvider>
+      <SeoManager />
       <div className="relative flex min-h-screen w-full flex-col bg-[var(--p-bg)] text-[var(--p-text)] font-sans bg-[image:var(--p-paper-noise)] bg-[size:180px_180px]">
         <Header />
         <main className="flex-1 px-6 py-8 md:px-14 md:py-9">

src/components/layout/Footer.tsx

@@ -1,14 +1,38 @@
 import { Link } from "react-router-dom";
 import { useAnalyticsConsent } from "../../core/privacy/analytics-consent-context";
+import { runtimeConfigValue } from "../../core/config/runtime-config";
 
 export function Footer() {
   const { choice, openSettings } = useAnalyticsConsent();
+  const repoUrl = runtimeConfigValue(
+    "VITE_PLIMI_REPO_URL",
+    "https://github.com/achrafachkari/plimi"
+  );
 
   return (
     <footer className="border-t border-[var(--p-border)] px-6 py-6 md:px-14">
       <div className="mx-auto flex max-w-[1200px] flex-col gap-4 text-sm text-[var(--p-muted)] sm:flex-row sm:items-center sm:justify-between">
-        <span>Plimi processes tool inputs locally in your browser.</span>
+        <span>
+          © {new Date().getFullYear()} Achraf Achkari. Plimi is free software under the{" "}
+          <a
+            href={repoUrl}
+            target="_blank"
+            rel="noopener noreferrer"
+            className="text-[var(--p-muted)] underline hover:text-[var(--p-text)]"
+          >
+            AGPL-3.0
+          </a>
+          .
+        </span>
         <nav className="flex flex-wrap items-center gap-x-5 gap-y-2">
+          <a
+            href={repoUrl}
+            target="_blank"
+            rel="noopener noreferrer"
+            className="text-[var(--p-muted)] no-underline hover:text-[var(--p-text)]"
+          >
+            Source code
+          </a>
           <Link
             to="/privacy"
             className="text-[var(--p-muted)] no-underline hover:text-[var(--p-text)]"

src/components/tool/ToolResultPanel.tsx

@@ -34,6 +34,18 @@ export function ToolResultPanel({
     URL.revokeObjectURL(url);
   }, []);
 
+  const previewBlob = useCallback((blob: Blob) => {
+    const url = URL.createObjectURL(blob);
+    window.open(url, "_blank", "noopener,noreferrer");
+    // The new tab keeps the blob alive; revoke after it has loaded.
+    setTimeout(() => URL.revokeObjectURL(url), 60_000);
+  }, []);
+
+  const canPreview = (mimeType: string) =>
+    mimeType === "application/pdf" ||
+    mimeType.startsWith("image/") ||
+    mimeType.startsWith("text/");
+
   if (result.type === "text") {
     return (
       <div 
@@ -178,12 +190,22 @@ export function ToolResultPanel({
                   {file.sizeAfter ? `${(file.sizeAfter / 1024).toFixed(1)} KB` : 'Ready'}
                 </span>
               </div>
+              <div className="flex items-center gap-2">
+                {canPreview(file.mimeType) && (
+                  <button
+                    onClick={() => previewBlob(file.blob)}
+                    className="px-3 py-1.5 rounded-lg bg-[var(--p-surface-2)] text-[var(--p-text)] border border-[var(--p-border)] font-sans text-xs font-semibold cursor-pointer"
+                  >
+                    Preview
+                  </button>
+                )}
                 <button
                   onClick={() => downloadBlob(file.blob, file.name)}
                   className="px-3 py-1.5 rounded-lg bg-[var(--p-accent)] text-[var(--p-accent-ink)] font-sans text-xs font-semibold cursor-pointer"
                 >
                   Download
                 </button>
+              </div>
             </li>
           ))}
         </ul>

src/components/tool/ToolShell.tsx

@@ -5,6 +5,7 @@ import type {
   UnknownPlimiPlugin,
 } from "../../core/plugins/plugin-types";
 import { describeToolPermissions } from "../../core/plugins/plugin-permissions";
+import { normalizeToolOptions } from "../../core/plugins/plugin-validation";
 import { ToolInputPanel } from "./ToolInputPanel";
 import { ToolOptionsPanel } from "./ToolOptionsPanel";
 import { ToolResultPanel } from "./ToolResultPanel";
@@ -87,6 +88,7 @@ export function ToolShell({
 }) {
   const [input, setInput] = useState<ToolInput>({});
   const [options, setOptions] = useState<ToolOptionsValue>({});
+  const [runWarning, setRunWarning] = useState<string | null>(null);
   const { run, cancel, result, isExecuting, progress, error } =
     useToolExecution(plugin);
 
@@ -96,8 +98,22 @@ export function ToolShell({
   const primaryExample = examples[0];
 
   const handleRun = useCallback(async () => {
-    await run(input, options);
-  }, [input, options, run]);
+    const normalizedOptions = normalizeToolOptions(plugin.optionsSchema, options);
+    if (plugin.getRunWarning) {
+      const warning = await plugin.getRunWarning(input, normalizedOptions);
+      if (warning) {
+        setRunWarning(warning);
+        return;
+      }
+    }
+    await run(input, normalizedOptions);
+  }, [input, options, run, plugin]);
+
+  const handleConfirmRun = useCallback(async () => {
+    setRunWarning(null);
+    const normalizedOptions = normalizeToolOptions(plugin.optionsSchema, options);
+    await run(input, normalizedOptions);
+  }, [input, options, run, plugin]);
 
   const handleApplyExample = useCallback(() => {
     if (!primaryExample) return;
@@ -228,10 +244,52 @@ export function ToolShell({
             disabled={isExecuting}
             className="cursor-pointer rounded-[10px] bg-[var(--p-accent)] px-[18px] py-[10px] font-sans text-[13px] font-semibold tracking-tight text-[var(--p-accent-ink)] transition-opacity disabled:cursor-not-allowed disabled:opacity-50"
           >
-            {isExecuting ? "Running..." : `Run ${plugin.manifest.name.split(" ")[0]} ->`}
+            {isExecuting ? "Running..." : `Run ${plugin.manifest.name.split(" ")[0]}`}
           </button>
         </div>
       </div>
+
+      {runWarning && (
+        <div
+          role="presentation"
+          onClick={() => setRunWarning(null)}
+          className="fixed inset-0 z-[60] flex items-center justify-center p-4 animate-plimi-fade"
+          style={{
+            background: "color-mix(in oklab, var(--p-bg) 60%, transparent)",
+            backdropFilter: "blur(4px)",
+          }}
+        >
+          <div
+            role="alertdialog"
+            aria-modal="true"
+            aria-label="Confirm download"
+            onClick={(e) => e.stopPropagation()}
+            className="w-full max-w-[420px] rounded-[18px] border-[1.5px] border-[var(--p-border)] bg-[var(--p-surface)] p-[22px] animate-plimi-slide"
+            style={{ boxShadow: "0 40px 80px -30px var(--p-shadow-soft)" }}
+          >
+            <div className="font-sans text-[16px] font-semibold tracking-tight text-[var(--p-text)]">
+              One-time download
+            </div>
+            <p className="mt-2 mb-5 font-sans text-[13px] leading-relaxed text-[var(--p-muted)]">
+              {runWarning}
+            </p>
+            <div className="flex justify-end gap-2">
+              <button
+                onClick={() => setRunWarning(null)}
+                className="cursor-pointer rounded-[10px] bg-[var(--p-chip)] px-[16px] py-[9px] font-sans text-[13px] font-medium text-[var(--p-muted)]"
+              >
+                Cancel
+              </button>
+              <button
+                onClick={handleConfirmRun}
+                className="cursor-pointer rounded-[10px] bg-[var(--p-accent)] px-[16px] py-[9px] font-sans text-[13px] font-semibold text-[var(--p-accent-ink)]"
+              >
+                Download &amp; run
+              </button>
+            </div>
+          </div>
+        </div>
+      )}
     </>
   );
 }

src/core/plugins/plugin-registry.ts

@@ -18,6 +18,7 @@ import { textDiffPlugin } from "../../tools/text-diff";
 import { htmlEntityPlugin } from "../../tools/html-entity";
 import { variablesConverterPlugin } from "../../tools/variables-converter";
 import { pdfSplitterPlugin } from "../../tools/pdf-splitter";
+import { pdfWatermarkPlugin } from "../../tools/pdf-watermark";
 import { imageRedactorPlugin } from "../../tools/image-redactor";
 import { exifScrubberPlugin } from "../../tools/exif-scrubber";
 import { jwtDecoderPlugin } from "../../tools/jwt-decoder";
@@ -26,6 +27,9 @@ import { qrCodeGeneratorPlugin } from "../../tools/qr-code-generator";
 import { passwordGeneratorPlugin } from "../../tools/password-generator";
 import { fileChecksumVerifierPlugin } from "../../tools/file-checksum-verifier";
 import { svgViewerPlugin } from "../../tools/svg-viewer";
+import { backgroundRemoverPlugin } from "../../tools/background-remover";
+import { imageToPdfPlugin } from "../../tools/image-to-pdf";
+import { pdfToDocxOcrPlugin } from "../../tools/pdf-to-docx-ocr";
 
 function erasePlugin<TOptions>(plugin: PlimiPlugin<TOptions>): UnknownPlimiPlugin {
   return plugin as unknown as UnknownPlimiPlugin;
@@ -51,6 +55,9 @@ export const pluginRegistry: UnknownPlimiPlugin[] = [
   erasePlugin(imageOptimizerPlugin),
   erasePlugin(pdfMergerPlugin),
   erasePlugin(pdfSplitterPlugin),
+  erasePlugin(pdfWatermarkPlugin),
+  erasePlugin(imageToPdfPlugin),
+  erasePlugin(pdfToDocxOcrPlugin),
   erasePlugin(imageRedactorPlugin),
   erasePlugin(exifScrubberPlugin),
   erasePlugin(jwtDecoderPlugin),
@@ -59,6 +66,7 @@ export const pluginRegistry: UnknownPlimiPlugin[] = [
   erasePlugin(passwordGeneratorPlugin),
   erasePlugin(fileChecksumVerifierPlugin),
   erasePlugin(svgViewerPlugin),
+  erasePlugin(backgroundRemoverPlugin),
 ];
 
 export function getAllPlugins(): UnknownPlimiPlugin[] {

src/core/plugins/plugin-runner.test.ts

@@ -0,0 +1,86 @@
+import { afterEach, describe, expect, it, vi } from "vitest";
+import type { ToolResult } from "../io/output-types";
+import type { PlimiPlugin, ToolContext } from "./plugin-types";
+import { disposePersistentWorker, runPlugin } from "./plugin-runner";
+
+class FakeWorker extends EventTarget {
+  terminate = vi.fn();
+  postMessage = vi.fn((request: { id: string }) => {
+    queueMicrotask(() => {
+      const result: ToolResult = { type: "text", value: "done" };
+      this.dispatchEvent(
+        new MessageEvent("message", {
+          data: { type: "success", id: request.id, result },
+        })
+      );
+    });
+  });
+}
+
+function makePlugin(
+  id: string,
+  persistentWorker: boolean,
+  workerFactory: () => Worker
+): PlimiPlugin<Record<string, never>> {
+  return {
+    manifest: {
+      id,
+      name: id,
+      description: id,
+      category: "image",
+      version: "1.0.0",
+      input: { type: "text" },
+      output: { type: "text" },
+      offlineReady: true,
+    },
+    capabilities: { worker: true, persistentWorker },
+    worker: workerFactory,
+  };
+}
+
+function makeContext(): ToolContext {
+  return {
+    signal: new AbortController().signal,
+    reportProgress: vi.fn(),
+    logger: { info: vi.fn(), warn: vi.fn(), error: vi.fn() },
+  };
+}
+
+describe("runPlugin worker lifecycle", () => {
+  afterEach(() => {
+    vi.restoreAllMocks();
+  });
+
+  it("reuses a persistent worker between runs", async () => {
+    const worker = new FakeWorker();
+    const factory = vi.fn(() => worker as unknown as Worker);
+    const plugin = makePlugin("persistent-test", true, factory);
+
+    await runPlugin(plugin, { text: "one" }, {}, makeContext());
+    await runPlugin(plugin, { text: "two" }, {}, makeContext());
+
+    expect(factory).toHaveBeenCalledTimes(1);
+    expect(worker.postMessage).toHaveBeenCalledTimes(2);
+    expect(worker.terminate).not.toHaveBeenCalled();
+
+    expect(disposePersistentWorker("persistent-test")).toBe(true);
+    expect(worker.terminate).toHaveBeenCalledOnce();
+
+    await runPlugin(plugin, { text: "three" }, {}, makeContext());
+    expect(factory).toHaveBeenCalledTimes(2);
+    disposePersistentWorker("persistent-test");
+  });
+
+  it("terminates a non-persistent worker after success", async () => {
+    const worker = new FakeWorker();
+    const plugin = makePlugin(
+      "temporary-test",
+      false,
+      () => worker as unknown as Worker
+    );
+
+    await runPlugin(plugin, { text: "one" }, {}, makeContext());
+
+    expect(worker.terminate).toHaveBeenCalledOnce();
+  });
+});

src/core/plugins/plugin-runner.ts

@@ -4,6 +4,44 @@ import type { ToolResult } from "../io/output-types";
 import type { ToolWorkerRequest, ToolWorkerResponse } from "./worker-protocol";
 import { normalizeToolOptions, validateToolInput } from "./plugin-validation";
 
+const persistentWorkers = new Map<string, Worker>();
+
+export function disposePersistentWorker(pluginId: string): boolean {
+  const worker = persistentWorkers.get(pluginId);
+  if (!worker) return false;
+  persistentWorkers.delete(pluginId);
+  worker.terminate();
+  return true;
+}
+
+function createPluginWorker<TOptions>(plugin: PlimiPlugin<TOptions>): Worker {
+  if (!plugin.worker) {
+    throw new Error("Worker is not defined for this plugin");
+  }
+
+  if (!plugin.capabilities?.persistentWorker) {
+    return plugin.worker();
+  }
+
+  const pluginId = plugin.manifest.id;
+  const existing = persistentWorkers.get(pluginId);
+  if (existing) return existing;
+
+  const worker = plugin.worker();
+  persistentWorkers.set(pluginId, worker);
+  return worker;
+}
+
+function discardPluginWorker<TOptions>(
+  plugin: PlimiPlugin<TOptions>,
+  worker: Worker
+): void {
+  if (persistentWorkers.get(plugin.manifest.id) === worker) {
+    persistentWorkers.delete(plugin.manifest.id);
+  }
+  worker.terminate();
+}
+
 export async function runPlugin<TOptions>(
   plugin: PlimiPlugin<TOptions>,
   input: ToolInput,
@@ -33,21 +71,28 @@ function runPluginInWorker<TOptions>(
   context: ToolContext
 ): Promise<ToolResult> {
   return new Promise((resolve, reject) => {
-    if (!plugin.worker) {
-      return reject(new Error("Worker is not defined for this plugin"));
+    let worker: Worker;
+    try {
+      worker = createPluginWorker(plugin);
+    } catch (error) {
+      reject(error);
+      return;
     }
-
-    const worker = plugin.worker();
     const jobId = Math.random().toString(36).substring(7);
 
-    // Handle cancellation
+    const cleanup = () => {
+      context.signal.removeEventListener("abort", onAbort);
+      worker.removeEventListener("message", onMessage);
+      worker.removeEventListener("error", onError);
+    };
+
     const onAbort = () => {
-      worker.terminate();
+      cleanup();
+      discardPluginWorker(plugin, worker);
       reject(new DOMException("Operation cancelled by user.", "AbortError"));
     };
-    context.signal.addEventListener("abort", onAbort);
 
-    worker.onmessage = (e: MessageEvent<ToolWorkerResponse>) => {
+    const onMessage = (e: MessageEvent<ToolWorkerResponse>) => {
       const { type, id } = e.data;
 
       if (id !== jobId) return;
@@ -55,22 +100,37 @@ function runPluginInWorker<TOptions>(
       if (type === "progress") {
         context.reportProgress(e.data.progress);
       } else if (type === "success") {
-        context.signal.removeEventListener("abort", onAbort);
+        cleanup();
+        if (!plugin.capabilities?.persistentWorker) {
           worker.terminate();
+        }
         resolve(e.data.result);
       } else if (type === "error") {
-        context.signal.removeEventListener("abort", onAbort);
-        worker.terminate();
+        cleanup();
+        discardPluginWorker(plugin, worker);
         reject(new Error(e.data.error));
       }
     };
 
-    worker.onerror = (e) => {
-      context.signal.removeEventListener("abort", onAbort);
-      worker.terminate();
-      reject(new Error("Worker error: " + e.message));
+    const onError = (e: ErrorEvent) => {
+      cleanup();
+      discardPluginWorker(plugin, worker);
+      const location = e.filename
+        ? ` (${e.filename}${e.lineno ? `:${e.lineno}:${e.colno}` : ""})`
+        : "";
+      reject(
+        new Error(
+          `Worker failed to load or execute${location}: ${
+            e.message || "check worker, CORS, and cross-origin isolation headers"
+          }`
+        )
+      );
     };
 
+    context.signal.addEventListener("abort", onAbort);
+    worker.addEventListener("message", onMessage);
+    worker.addEventListener("error", onError);
+
     // Serialize input payload (can't send DOM elements or complex functions)
     const request: ToolWorkerRequest<TOptions> = {
       type: "run",

src/core/plugins/plugin-types.ts

@@ -80,6 +80,8 @@ export type ToolOptionsValue = Record<string, ToolOptionValue>;
 export interface ToolCapabilities {
   batch?: boolean;
   worker?: boolean;
+  /** Keep the worker alive between runs so it can retain expensive state. */
+  persistentWorker?: boolean;
   wasm?: boolean;
   preview?: boolean;
   streaming?: boolean;
@@ -138,6 +140,16 @@ export interface PlimiPlugin<TOptions = unknown> {
 
   worker?: () => Worker;
 
+  /**
+   * Optional pre-run check. Return a message to surface a confirmation dialog
+   * before the tool runs (e.g. "this will download 44 MB"); return null to run
+   * immediately. Runs on the main thread, so it can inspect caches/storage.
+   */
+  getRunWarning?: (
+    input: ToolInput,
+    options: TOptions
+  ) => Promise<string | null> | string | null;
+
   customUi?: React.LazyExoticComponent<
     React.ComponentType<ToolUiProps<TOptions>>
   >;
@@ -145,10 +157,14 @@ export interface PlimiPlugin<TOptions = unknown> {
 
 export type UnknownPlimiPlugin = Omit<
   PlimiPlugin<never>,
-  "run" | "customUi"
+  "run" | "customUi" | "getRunWarning"
 > & {
   run?: ToolRunner<ToolOptionsValue>;
   examples?: ToolExample<ToolOptionsValue>[];
+  getRunWarning?: (
+    input: ToolInput,
+    options: ToolOptionsValue
+  ) => Promise<string | null> | string | null;
   customUi?: React.LazyExoticComponent<
     React.ComponentType<ToolUiProps<ToolOptionsValue>>
   >;

src/core/privacy/AnalyticsConsent.tsx

@@ -45,6 +45,7 @@ function loadAnalyticsScript() {
   const script = document.createElement("script");
   script.id = SCRIPT_ID;
   script.defer = true;
+  script.crossOrigin = "anonymous";
   script.src = privacyConfig.analyticsScriptUrl;
   script.dataset.websiteId = privacyConfig.analyticsWebsiteId;
   script.dataset.hostUrl = privacyConfig.analyticsHostUrl;

src/core/seo/SeoManager.tsx

@@ -0,0 +1,188 @@
+import { useEffect } from "react";
+import { useLocation } from "react-router-dom";
+import { runtimeConfigValue } from "../config/runtime-config";
+import { pluginRegistry } from "../plugins/plugin-registry";
+
+const DEFAULT_DESCRIPTION =
+  "Free privacy-first tools for files, images, PDFs, text, and code. Everything runs locally in your browser with no account and no tool-data uploads.";
+
+const PAGE_METADATA: Record<string, { title: string; description: string }> = {
+  "/": {
+    title: "Plimi - Free Private Browser Tools",
+    description: DEFAULT_DESCRIPTION,
+  },
+  "/tools": {
+    title: "Free Private Online Tools | Plimi",
+    description:
+      "Browse free browser-based utilities for images, PDFs, text, developer tasks, and privacy. Tools run locally without uploading your data.",
+  },
+  "/how-it-works": {
+    title: "How Plimi Processes Files Locally",
+    description:
+      "Learn how Plimi uses browser APIs, Web Workers, WebAssembly, and local libraries to process files without uploading tool data.",
+  },
+  "/contribute": {
+    title: "Contribute a Browser Tool to Plimi",
+    description:
+      "Learn how to build, test, and contribute a typed, privacy-first browser utility to the open-source Plimi tool collection.",
+  },
+  "/privacy": {
+    title: "Privacy and Legal Information | Plimi",
+    description:
+      "Read how Plimi processes tool inputs locally, handles optional analytics, stores preferences, and protects your privacy.",
+  },
+};
+
+function setNamedMeta(name: string, content: string) {
+  let element = document.head.querySelector<HTMLMetaElement>(
+    `meta[name="${name}"]`,
+  );
+  if (!element) {
+    element = document.createElement("meta");
+    element.name = name;
+    document.head.appendChild(element);
+  }
+  element.content = content;
+}
+
+function setPropertyMeta(property: string, content: string) {
+  let element = document.head.querySelector<HTMLMetaElement>(
+    `meta[property="${property}"]`,
+  );
+  if (!element) {
+    element = document.createElement("meta");
+    element.setAttribute("property", property);
+    document.head.appendChild(element);
+  }
+  element.content = content;
+}
+
+function setCanonical(href: string) {
+  let element = document.head.querySelector<HTMLLinkElement>(
+    'link[rel="canonical"]',
+  );
+  if (!element) {
+    element = document.createElement("link");
+    element.rel = "canonical";
+    document.head.appendChild(element);
+  }
+  element.href = href;
+}
+
+export function SeoManager() {
+  const { pathname } = useLocation();
+
+  useEffect(() => {
+    const siteUrl = runtimeConfigValue(
+      "VITE_SITE_URL",
+      window.location.origin,
+    ).replace(/\/+$/, "");
+    const toolId = pathname.startsWith("/tools/")
+      ? pathname.slice("/tools/".length).replace(/\/+$/, "")
+      : null;
+    const plugin = toolId
+      ? pluginRegistry.find((item) => item.manifest.id === toolId)
+      : undefined;
+    const page = PAGE_METADATA[pathname];
+    const title = plugin
+      ? `${plugin.manifest.name} - Free Private Online Tool | Plimi`
+      : page?.title ?? "Page Not Found | Plimi";
+    const description = plugin
+      ? `${plugin.manifest.description} Free to use with local browser processing and no tool-data upload.`
+      : page?.description ?? DEFAULT_DESCRIPTION;
+    const canonicalPath = pathname === "/" ? "/tools" : pathname;
+    const canonicalUrl = `${siteUrl}${canonicalPath}`;
+    const isNotFound = !plugin && !page;
+
+    document.title = title;
+    setNamedMeta("description", description);
+    setNamedMeta(
+      "robots",
+      isNotFound ? "noindex, nofollow" : "index, follow",
+    );
+    setNamedMeta("twitter:card", "summary");
+    setNamedMeta("twitter:title", title);
+    setNamedMeta("twitter:description", description);
+    setPropertyMeta("og:type", "website");
+    setPropertyMeta("og:site_name", "Plimi");
+    setPropertyMeta("og:locale", "en_US");
+    setPropertyMeta("og:title", title);
+    setPropertyMeta("og:description", description);
+    setPropertyMeta("og:url", canonicalUrl);
+    setCanonical(canonicalUrl);
+
+    document.head
+      .querySelectorAll('script[type="application/ld+json"][data-plimi-seo]')
+      .forEach((element) => element.remove());
+
+    if (isNotFound) return;
+
+    let structuredData;
+    if (plugin) {
+      structuredData = {
+          "@context": "https://schema.org",
+          "@type": "WebApplication",
+          name: plugin.manifest.name,
+          description: plugin.manifest.description,
+          url: canonicalUrl,
+          applicationCategory: `${plugin.manifest.category} utility`,
+          applicationSubCategory: plugin.manifest.tags?.join(", "),
+          browserRequirements: "Requires a modern web browser",
+          operatingSystem: "Any",
+          isAccessibleForFree: true,
+          offers: {
+            "@type": "Offer",
+            price: "0",
+            priceCurrency: "USD",
+          },
+          featureList: [
+            "Runs locally in the browser",
+            "No account required",
+            "No tool-data upload",
+            ...(plugin.manifest.offlineReady ? ["Offline-ready"] : []),
+          ],
+          publisher: {
+            "@type": "Organization",
+            name: "Plimi",
+            url: `${siteUrl}/tools`,
+          },
+        };
+    } else if (pathname === "/" || pathname === "/tools") {
+      structuredData = {
+          "@context": "https://schema.org",
+          "@type": "ItemList",
+          name: "Plimi private browser tools",
+          url: `${siteUrl}/tools`,
+          description,
+          numberOfItems: pluginRegistry.length,
+          itemListElement: pluginRegistry.map((item, index) => ({
+            "@type": "ListItem",
+            position: index + 1,
+            url: `${siteUrl}/tools/${item.manifest.id}`,
+            name: item.manifest.name,
+          })),
+        };
+    } else {
+      structuredData = {
+        "@context": "https://schema.org",
+        "@type": "WebPage",
+        name: title,
+        url: canonicalUrl,
+        description,
+        isPartOf: {
+          "@type": "WebSite",
+          name: "Plimi",
+          url: `${siteUrl}/tools`,
+        },
+      };
+    }
+
+    const script = document.createElement("script");
+    script.type = "application/ld+json";
+    script.dataset.plimiSeo = "";
+    script.text = JSON.stringify(structuredData);
+    document.head.appendChild(script);
+  }, [pathname]);
+
+  return null;
+}

src/main.tsx

@@ -4,7 +4,14 @@ import "./index.css";
 import { App } from "./app/App";
 import { ThemeProvider } from "./app/ThemeProvider";
 
-createRoot(document.getElementById("root")!).render(
+const rootElement = document.getElementById("root")!;
+
+if (rootElement.hasAttribute("data-static-seo")) {
+  rootElement.replaceChildren();
+  rootElement.removeAttribute("data-static-seo");
+}
+
+createRoot(rootElement).render(
   <StrictMode>
     <ThemeProvider>
       <App />

src/pages/PrivacyPage.tsx

@@ -134,6 +134,14 @@ export function PrivacyPage() {
           settings. Plimi does not use analytics cookies, advertising cookies,
           or marketing pixels.
         </p>
+        <p className="m-0">
+          If you use automatic background removal, Plimi stores the selected AI
+          model and its ONNX runtime files in your browser&apos;s Cache Storage.
+          This avoids downloading the same large files for every run. The cache
+          contains application assets only, not your uploaded images, masks, or
+          generated results. You can delete it at any time with the
+          &quot;Clear models&quot; button in the Background Remover.
+        </p>
       </Section>
 
       <Section title="Recipients and transfers">

src/pages/ToolDetailPage.tsx

@@ -1,55 +1,54 @@
-import { useParams, useNavigate } from "react-router-dom";
+import { Link, useParams } from "react-router-dom";
 import { pluginRegistry } from "../core/plugins/plugin-registry";
 import { ToolShell } from "../components/tool/ToolShell";
 import { useTheme } from "../app/useTheme";
 
 export function ToolDetailPage() {
   const { toolId } = useParams<{ toolId: string }>();
-  const navigate = useNavigate();
   const { dark } = useTheme();
 
-  const plugin = pluginRegistry.find((p) => p.manifest.id === toolId);
+  const plugin = pluginRegistry.find((item) => item.manifest.id === toolId);
 
   if (!plugin) {
     return (
       <div className="p-8">
-        <h2 className="text-xl font-semibold mb-4 text-[var(--p-text)]">Tool not found</h2>
-        <button onClick={() => navigate("/tools")} className="text-blue-500 hover:underline">
+        <h1 className="mb-4 text-xl font-semibold text-[var(--p-text)]">
+          Tool not found
+        </h1>
+        <Link to="/tools" className="text-blue-500 hover:underline">
           Return to directory
-        </button>
+        </Link>
       </div>
     );
   }
 
-  const handleClose = () => {
-    navigate("/tools");
-  };
-
   return (
-    <div
-      onClick={handleClose}
-      role="presentation"
-      className="fixed inset-0 z-50 flex items-end justify-center p-0 md:items-center md:p-10 animate-plimi-fade"
-      style={{
-        background: 'color-mix(in oklab, var(--p-bg) 70%, transparent)',
-        backdropFilter: 'blur(8px)',
-      }}
+    <div className="mx-auto flex w-full max-w-[1280px] flex-col gap-4 animate-plimi-fade">
+      <Link
+        to="/tools"
+        className="self-start font-sans text-[13px] text-[var(--p-muted)] transition-colors hover:text-[var(--p-text)]"
       >
+        &larr; Back to tools
+      </Link>
+
+      <header className="flex max-w-[760px] flex-col gap-2">
+        <span className="font-mono text-[11px] uppercase tracking-[0.12em] text-[var(--p-muted)]">
+          {plugin.manifest.category} tool / browser-local
+        </span>
+        <h1 className="m-0 font-sans text-3xl font-bold tracking-tight text-[var(--p-text)] md:text-[42px]">
+          {plugin.manifest.name}
+        </h1>
+        <p className="m-0 text-base leading-relaxed text-[var(--p-muted)]">
+          {plugin.manifest.description} It runs locally in your browser, with no
+          account and no tool-data upload.
+        </p>
+      </header>
+
       <div
-        onClick={(e) => e.stopPropagation()}
-        role="dialog"
-        aria-modal="true"
-        aria-label={plugin.manifest.name}
-        className="w-full md:w-[min(900px,100%)] h-[92dvh] md:h-auto md:max-h-[calc(100dvh-5rem)] bg-[var(--p-surface)] rounded-t-[20px] md:rounded-[24px] border-[1.5px] border-[var(--p-border)] flex flex-col animate-plimi-slide overflow-hidden"
-        style={{
-          boxShadow: '0 40px 80px -30px var(--p-shadow-soft)',
-        }}
+        className="flex min-h-[70vh] flex-col overflow-hidden rounded-[24px] border-[1.5px] border-[var(--p-border)] bg-[var(--p-surface)]"
+        style={{ boxShadow: "0 40px 80px -30px var(--p-shadow-soft)" }}
       >
-        {/* Grab handle — signals the sheet is dismissable on touch */}
-        <div className="md:hidden flex justify-center pt-2.5 pb-1 shrink-0">
-          <span className="h-1 w-9 rounded-full bg-[var(--p-border)]" />
-        </div>
-        <ToolShell plugin={plugin} onClose={handleClose} dark={dark} />
+        <ToolShell plugin={plugin} dark={dark} />
       </div>
     </div>
   );

src/pages/ToolsPage.tsx

@@ -127,7 +127,7 @@ export function ToolsPage() {
                 {tools.map((t) => {
                   const flatIdx = filtered.indexOf(t);
                   return (
-                    <ToolTile key={t.manifest.id} plugin={t} onClick={handleOpenTool} focused={flatIdx === safeFocusedIndex} dark={dark} index={flatIdx} />
+                    <ToolTile key={t.manifest.id} plugin={t} focused={flatIdx === safeFocusedIndex} dark={dark} index={flatIdx} />
                   );
                 })}
               </div>
@@ -141,7 +141,7 @@ export function ToolsPage() {
       ) : (
         <div className="grid grid-cols-1 sm:grid-cols-2 md:grid-cols-3 lg:grid-cols-4 gap-4 mt-4">
           {filtered.map((t, flatIdx) => (
-            <ToolTile key={t.manifest.id} plugin={t} onClick={handleOpenTool} focused={flatIdx === safeFocusedIndex} dark={dark} index={flatIdx} />
+            <ToolTile key={t.manifest.id} plugin={t} focused={flatIdx === safeFocusedIndex} dark={dark} index={flatIdx} />
           ))}
         </div>
       )}

src/tools/background-remover/BackgroundRemoverUi.tsx

@@ -0,0 +1,757 @@
+import {
+  useCallback,
+  useEffect,
+  useRef,
+  useState,
+  type PointerEvent as ReactPointerEvent,
+} from "react";
+import type { ToolUiProps } from "../../core/plugins/plugin-types";
+import { Button } from "../../components/ui/Button";
+import { Card } from "../../components/ui/Card";
+import { Dropzone } from "../../components/ui/Dropzone";
+import { Select } from "../../components/ui/Select";
+import { Slider } from "../../components/ui/Slider";
+import { ToolProgress } from "../../components/tool/ToolProgress";
+import { useToolExecution } from "../../components/tool/useToolExecution";
+import { disposePersistentWorker } from "../../core/plugins/plugin-runner";
+import { clearImglyCache } from "./imgly-cache";
+import type { BackgroundRemoverOptions } from "./remove";
+
+type EditMode = "automatic" | "select-area";
+type EditorAction = "sample" | "remove" | "restore";
+
+interface Point {
+  x: number;
+  y: number;
+}
+
+interface MaskStroke {
+  type: "stroke";
+  action: Exclude<EditorAction, "sample">;
+  points: Point[];
+  size: number;
+}
+
+interface SampleSelection {
+  type: "sample";
+  point: Point;
+  tolerance: number;
+}
+
+type MaskOperation = MaskStroke | SampleSelection;
+
+function drawStrokePath(
+  context: CanvasRenderingContext2D,
+  stroke: MaskStroke,
+  width: number,
+  height: number
+): void {
+  const points = stroke.points;
+  if (points.length === 0) return;
+
+  const scale = Math.min(width, height);
+  context.lineWidth = stroke.size * scale;
+  context.lineCap = "round";
+  context.lineJoin = "round";
+  context.beginPath();
+  context.moveTo(points[0].x * width, points[0].y * height);
+
+  if (points.length === 1) {
+    context.lineTo(points[0].x * width + 0.01, points[0].y * height);
+  } else {
+    for (const point of points.slice(1)) {
+      context.lineTo(point.x * width, point.y * height);
+    }
+  }
+  context.stroke();
+}
+
+function applyStroke(
+  output: HTMLCanvasElement,
+  source: HTMLCanvasElement,
+  scratch: HTMLCanvasElement,
+  stroke: MaskStroke
+): void {
+  const outputContext = output.getContext("2d");
+  const scratchContext = scratch.getContext("2d");
+  if (!outputContext || !scratchContext) return;
+
+  if (stroke.action === "remove") {
+    outputContext.save();
+    outputContext.globalCompositeOperation = "destination-out";
+    outputContext.strokeStyle = "#000";
+    drawStrokePath(outputContext, stroke, output.width, output.height);
+    outputContext.restore();
+    return;
+  }
+
+  scratchContext.clearRect(0, 0, scratch.width, scratch.height);
+  scratchContext.globalCompositeOperation = "source-over";
+  scratchContext.drawImage(source, 0, 0);
+  scratchContext.globalCompositeOperation = "destination-in";
+  scratchContext.strokeStyle = "#000";
+  drawStrokePath(scratchContext, stroke, scratch.width, scratch.height);
+  scratchContext.globalCompositeOperation = "source-over";
+
+  outputContext.drawImage(scratch, 0, 0);
+}
+
+function applySampleSelection(
+  output: HTMLCanvasElement,
+  source: HTMLCanvasElement,
+  selection: SampleSelection
+): void {
+  const outputContext = output.getContext("2d", { willReadFrequently: true });
+  const sourceContext = source.getContext("2d", { willReadFrequently: true });
+  if (!outputContext || !sourceContext) return;
+
+  const { width, height } = output;
+  const sourceData = sourceContext.getImageData(0, 0, width, height);
+  const outputData = outputContext.getImageData(0, 0, width, height);
+  const startX = Math.min(width - 1, Math.floor(selection.point.x * width));
+  const startY = Math.min(height - 1, Math.floor(selection.point.y * height));
+  const startIndex = startY * width + startX;
+  const startOffset = startIndex * 4;
+  const targetR = sourceData.data[startOffset];
+  const targetG = sourceData.data[startOffset + 1];
+  const targetB = sourceData.data[startOffset + 2];
+  const threshold = (selection.tolerance / 100) * Math.sqrt(3 * 255 * 255);
+  const thresholdSquared = threshold * threshold;
+  const visited = new Uint8Array(width * height);
+  const stack = new Uint32Array(width * height);
+  let stackSize = 0;
+  visited[startIndex] = 1;
+  stack[stackSize++] = startIndex;
+
+  while (stackSize > 0) {
+    const index = stack[--stackSize];
+    const offset = index * 4;
+    const deltaR = sourceData.data[offset] - targetR;
+    const deltaG = sourceData.data[offset + 1] - targetG;
+    const deltaB = sourceData.data[offset + 2] - targetB;
+    const distanceSquared =
+      deltaR * deltaR + deltaG * deltaG + deltaB * deltaB;
+    if (distanceSquared > thresholdSquared) continue;
+
+    outputData.data[offset + 3] = 0;
+    const x = index % width;
+    const y = Math.floor(index / width);
+    const neighbors = [
+      x > 0 ? index - 1 : -1,
+      x + 1 < width ? index + 1 : -1,
+      y > 0 ? index - width : -1,
+      y + 1 < height ? index + width : -1,
+    ];
+    for (const neighbor of neighbors) {
+      if (neighbor >= 0 && !visited[neighbor]) {
+        visited[neighbor] = 1;
+        stack[stackSize++] = neighbor;
+      }
+    }
+  }
+
+  outputContext.putImageData(outputData, 0, 0);
+}
+
+function downloadBlob(blob: Blob, name: string): void {
+  const url = URL.createObjectURL(blob);
+  const anchor = document.createElement("a");
+  anchor.href = url;
+  anchor.download = name;
+  document.body.appendChild(anchor);
+  anchor.click();
+  anchor.remove();
+  URL.revokeObjectURL(url);
+}
+
+export default function BackgroundRemoverUi({
+  plugin,
+}: ToolUiProps<BackgroundRemoverOptions>) {
+  const [files, setFiles] = useState<File[]>([]);
+  const [sourceUrl, setSourceUrl] = useState("");
+  const [resultUrl, setResultUrl] = useState("");
+  const [editMode, setEditMode] = useState<EditMode>("automatic");
+  const [quality, setQuality] =
+    useState<BackgroundRemoverOptions["quality"]>("small");
+  const [useGpu, setUseGpu] = useState(true);
+  const [editorAction, setEditorAction] = useState<EditorAction>("sample");
+  const [tolerance, setTolerance] = useState(14);
+  const [brushSize, setBrushSize] = useState(4);
+  const [operations, setOperations] = useState<MaskOperation[]>([]);
+  const [isDrawing, setIsDrawing] = useState(false);
+  const [warning, setWarning] = useState<string | null>(null);
+  const [pendingOptions, setPendingOptions] =
+    useState<BackgroundRemoverOptions | null>(null);
+  const [cacheMessage, setCacheMessage] = useState("");
+  const [isClearingCache, setIsClearingCache] = useState(false);
+
+  const canvasRef = useRef<HTMLCanvasElement>(null);
+  const sourceCanvasRef = useRef<HTMLCanvasElement | null>(null);
+  const baseCanvasRef = useRef<HTMLCanvasElement | null>(null);
+  const scratchCanvasRef = useRef<HTMLCanvasElement | null>(null);
+  const activeStrokeRef = useRef<MaskStroke | null>(null);
+  const resultUrlRef = useRef("");
+
+  const { run, result, isExecuting, progress, error, reset } =
+    useToolExecution(plugin);
+
+  const resultFile =
+    result?.type === "files" && result.files.length > 0
+      ? result.files[0]
+      : null;
+
+  useEffect(() => {
+    return () => {
+      if (sourceUrl) URL.revokeObjectURL(sourceUrl);
+    };
+  }, [sourceUrl]);
+
+  useEffect(
+    () => () => {
+      if (resultUrlRef.current) URL.revokeObjectURL(resultUrlRef.current);
+    },
+    []
+  );
+
+  const renderOperations = useCallback((nextOperations: MaskOperation[]) => {
+    const output = canvasRef.current;
+    const base = baseCanvasRef.current;
+    const source = sourceCanvasRef.current;
+    const scratch = scratchCanvasRef.current;
+    if (!output || !base || !source || !scratch) return;
+
+    const context = output.getContext("2d");
+    if (!context) return;
+    context.clearRect(0, 0, output.width, output.height);
+    context.drawImage(base, 0, 0);
+    for (const operation of nextOperations) {
+      if (operation.type === "sample") {
+        applySampleSelection(output, source, operation);
+      } else {
+        applyStroke(output, source, scratch, operation);
+      }
+    }
+  }, []);
+
+  useEffect(() => {
+    if (editMode !== "select-area" || files.length === 0) return;
+
+    let cancelled = false;
+    const initialize = async () => {
+      const sourceBitmap = await createImageBitmap(files[0]);
+      if (cancelled) {
+        sourceBitmap.close();
+        return;
+      }
+
+      const width = sourceBitmap.width;
+      const height = sourceBitmap.height;
+      const sourceCanvas = document.createElement("canvas");
+      const baseCanvas = document.createElement("canvas");
+      const scratchCanvas = document.createElement("canvas");
+      for (const canvas of [sourceCanvas, baseCanvas, scratchCanvas]) {
+        canvas.width = width;
+        canvas.height = height;
+      }
+
+      sourceCanvas.getContext("2d")?.drawImage(sourceBitmap, 0, 0, width, height);
+      baseCanvas.getContext("2d")?.drawImage(sourceBitmap, 0, 0, width, height);
+      sourceCanvasRef.current = sourceCanvas;
+      baseCanvasRef.current = baseCanvas;
+      scratchCanvasRef.current = scratchCanvas;
+
+      const output = canvasRef.current;
+      if (output) {
+        output.width = width;
+        output.height = height;
+        output.getContext("2d")?.drawImage(baseCanvas, 0, 0);
+      }
+
+      sourceBitmap.close();
+      setOperations([]);
+    };
+
+    void initialize();
+    return () => {
+      cancelled = true;
+    };
+  }, [editMode, files]);
+
+  const clearResult = useCallback(() => {
+    if (resultUrlRef.current) {
+      URL.revokeObjectURL(resultUrlRef.current);
+      resultUrlRef.current = "";
+    }
+    setResultUrl("");
+    setOperations([]);
+    activeStrokeRef.current = null;
+    reset();
+  }, [reset]);
+
+  const handleFilesDrop = useCallback(
+    (nextFiles: File[]) => {
+      setFiles(nextFiles);
+      setSourceUrl(
+        nextFiles.length > 0 ? URL.createObjectURL(nextFiles[0]) : ""
+      );
+      clearResult();
+    },
+    [clearResult]
+  );
+
+  const execute = useCallback(
+    async (options: BackgroundRemoverOptions) => {
+      if (files.length === 0) return;
+      const nextResult = await run({ files }, options);
+      if (nextResult?.type === "files" && nextResult.files.length > 0) {
+        if (resultUrlRef.current) URL.revokeObjectURL(resultUrlRef.current);
+        const url = URL.createObjectURL(nextResult.files[0].blob);
+        resultUrlRef.current = url;
+        setResultUrl(url);
+      }
+    },
+    [files, run]
+  );
+
+  const handleRun = useCallback(async () => {
+    const options = { quality, useGpu };
+    if (plugin.getRunWarning) {
+      const nextWarning = await plugin.getRunWarning({ files }, options);
+      if (nextWarning) {
+        setPendingOptions(options);
+        setWarning(nextWarning);
+        return;
+      }
+    }
+    await execute(options);
+  }, [execute, files, plugin, quality, useGpu]);
+
+  const pointFromEvent = (
+    event: ReactPointerEvent<HTMLCanvasElement>
+  ): Point => {
+    const rect = event.currentTarget.getBoundingClientRect();
+    return {
+      x: Math.max(0, Math.min(1, (event.clientX - rect.left) / rect.width)),
+      y: Math.max(0, Math.min(1, (event.clientY - rect.top) / rect.height)),
+    };
+  };
+
+  const handlePointerDown = (event: ReactPointerEvent<HTMLCanvasElement>) => {
+    if (!canvasRef.current || !sourceCanvasRef.current || !scratchCanvasRef.current) {
+      return;
+    }
+    event.preventDefault();
+    if (editorAction === "sample") {
+      const selection: SampleSelection = {
+        type: "sample",
+        point: pointFromEvent(event),
+        tolerance,
+      };
+      applySampleSelection(
+        canvasRef.current,
+        sourceCanvasRef.current,
+        selection
+      );
+      setOperations((current) => [...current, selection]);
+      return;
+    }
+
+    event.currentTarget.setPointerCapture(event.pointerId);
+    const stroke: MaskStroke = {
+      type: "stroke",
+      action: editorAction,
+      points: [pointFromEvent(event)],
+      size: brushSize / 100,
+    };
+    activeStrokeRef.current = stroke;
+    setIsDrawing(true);
+    applyStroke(
+      canvasRef.current,
+      sourceCanvasRef.current,
+      scratchCanvasRef.current,
+      stroke
+    );
+  };
+
+  const handlePointerMove = (event: ReactPointerEvent<HTMLCanvasElement>) => {
+    const active = activeStrokeRef.current;
+    const output = canvasRef.current;
+    const source = sourceCanvasRef.current;
+    const scratch = scratchCanvasRef.current;
+    if (!isDrawing || !active || !output || !source || !scratch) return;
+
+    const point = pointFromEvent(event);
+    const segment: MaskStroke = {
+      ...active,
+      points: [active.points.at(-1) ?? point, point],
+    };
+    active.points.push(point);
+    applyStroke(output, source, scratch, segment);
+  };
+
+  const finishStroke = (event: ReactPointerEvent<HTMLCanvasElement>) => {
+    const active = activeStrokeRef.current;
+    if (!active) return;
+    if (event.currentTarget.hasPointerCapture(event.pointerId)) {
+      event.currentTarget.releasePointerCapture(event.pointerId);
+    }
+    activeStrokeRef.current = null;
+    setIsDrawing(false);
+    setOperations((current) => [...current, active]);
+  };
+
+  const handleUndo = () => {
+    setOperations((current) => {
+      const next = current.slice(0, -1);
+      renderOperations(next);
+      return next;
+    });
+  };
+
+  const handleResetMask = () => {
+    setOperations([]);
+    renderOperations([]);
+  };
+
+  const handleDownloadEdited = async () => {
+    const canvas = canvasRef.current;
+    if (!canvas || files.length === 0) return;
+    const blob = await new Promise<Blob | null>((resolve) =>
+      canvas.toBlob(resolve, "image/png")
+    );
+    if (blob) {
+      const name =
+        files[0].name.replace(/\.[^./\\]+$/, "") + "_manual-no-bg.png";
+      downloadBlob(blob, name);
+    }
+  };
+
+  const handleModeChange = (nextMode: EditMode) => {
+    setEditMode(nextMode);
+    clearResult();
+  };
+
+  const handleClearModels = async () => {
+    setIsClearingCache(true);
+    setCacheMessage("");
+    try {
+      const deleted = await clearImglyCache();
+      const released = disposePersistentWorker(plugin.manifest.id);
+      setCacheMessage(
+        deleted || released
+          ? "Cached models cleared. Automatic mode will download them again."
+          : "No cached models were found."
+      );
+    } catch {
+      setCacheMessage("Could not clear cached models.");
+    } finally {
+      setIsClearingCache(false);
+    }
+  };
+
+  return (
+    <div className="mx-auto max-w-6xl p-[18px] md:p-[28px]">
+      <div className="grid grid-cols-1 gap-6 lg:grid-cols-[minmax(0,1fr)_300px]">
+        <div className="space-y-6">
+          {files.length === 0 ? (
+            <Card title="Upload Image">
+              <Dropzone
+                accept="image/jpeg,image/png,image/webp"
+                multiple={false}
+                maxSizeMb={25}
+                onFilesDrop={handleFilesDrop}
+              />
+            </Card>
+          ) : (
+            <Card
+              title={
+                editMode === "select-area"
+                  ? "Select Background"
+                  : resultFile
+                    ? "Result"
+                    : "Source Image"
+              }
+            >
+              <div
+                className="flex min-h-[320px] items-center justify-center overflow-hidden rounded-xl border border-[var(--p-border)]"
+                style={{
+                  backgroundColor: "#fff",
+                  backgroundImage:
+                    "linear-gradient(45deg,#ddd 25%,transparent 25%),linear-gradient(-45deg,#ddd 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#ddd 75%),linear-gradient(-45deg,transparent 75%,#ddd 75%)",
+                  backgroundPosition: "0 0,0 8px,8px -8px,-8px 0",
+                  backgroundSize: "16px 16px",
+                }}
+              >
+                {editMode === "select-area" ? (
+                  <canvas
+                    ref={canvasRef}
+                    onPointerDown={handlePointerDown}
+                    onPointerMove={handlePointerMove}
+                    onPointerUp={finishStroke}
+                    onPointerCancel={finishStroke}
+                    className="max-h-[65vh] max-w-full cursor-crosshair object-contain"
+                    style={{ touchAction: "none" }}
+                    aria-label="Background mask editor"
+                  />
+                ) : (
+                  <img
+                    src={resultUrl || sourceUrl}
+                    alt={resultFile ? "Background removed" : "Source"}
+                    className="max-h-[65vh] max-w-full object-contain"
+                  />
+                )}
+              </div>
+              {editMode === "select-area" && (
+                <p className="mb-0 mt-3 text-sm text-[var(--p-muted)]">
+                  Choose Select background and click a representative point.
+                  Only the connected region with a similar color is removed.
+                </p>
+              )}
+            </Card>
+          )}
+
+          {isExecuting && (
+            <ToolProgress
+              percentage={progress.percentage ?? 0}
+              message={progress.message}
+            />
+          )}
+
+          {error && (
+            <Card className="border-red-300">
+              <p className="m-0 text-sm text-red-700">{error}</p>
+            </Card>
+          )}
+        </div>
+
+        <div className="space-y-6">
+          <Card title="Mode">
+            <div className="grid grid-cols-2 gap-2">
+              <Button
+                variant={editMode === "automatic" ? "primary" : "secondary"}
+                onClick={() => handleModeChange("automatic")}
+                disabled={isExecuting}
+              >
+                Automatic
+              </Button>
+              <Button
+                variant={editMode === "select-area" ? "primary" : "secondary"}
+                onClick={() => handleModeChange("select-area")}
+                disabled={isExecuting}
+              >
+                Select area
+              </Button>
+            </div>
+            <p className="mb-0 mt-3 text-xs leading-relaxed text-[var(--p-muted)]">
+              Select area uses a sampled background color and does not run the
+              AI model.
+            </p>
+          </Card>
+
+          <Card title="Settings">
+            <div className="space-y-5">
+              {editMode === "automatic" ? (
+                <>
+                  <Select
+                    label="Model"
+                    value={quality}
+                    disabled={isExecuting}
+                    onChange={(event) => {
+                      setQuality(
+                        event.target.value as BackgroundRemoverOptions["quality"]
+                      );
+                      clearResult();
+                    }}
+                    options={[
+                      { label: "Smallest download (quantized)", value: "small" },
+                      { label: "Balanced (FP16)", value: "medium" },
+                      { label: "Best quality (FP32)", value: "large" },
+                    ]}
+                  />
+
+                  <label className="flex items-center gap-2 text-sm text-[var(--p-text)]">
+                    <input
+                      type="checkbox"
+                      checked={useGpu}
+                      disabled={isExecuting}
+                      onChange={(event) => {
+                        setUseGpu(event.target.checked);
+                        clearResult();
+                      }}
+                      className="h-4 w-4 accent-[var(--p-accent)]"
+                    />
+                    Use GPU acceleration
+                  </label>
+                </>
+              ) : (
+                <div className="space-y-4">
+                  <div className="grid grid-cols-3 gap-2">
+                    <Button
+                      variant={editorAction === "sample" ? "primary" : "secondary"}
+                      onClick={() => setEditorAction("sample")}
+                    >
+                      Select
+                    </Button>
+                    <Button
+                      variant={editorAction === "remove" ? "primary" : "secondary"}
+                      onClick={() => setEditorAction("remove")}
+                    >
+                      Remove
+                    </Button>
+                    <Button
+                      variant={editorAction === "restore" ? "primary" : "secondary"}
+                      onClick={() => setEditorAction("restore")}
+                    >
+                      Restore
+                    </Button>
+                  </div>
+
+                  {editorAction === "sample" ? (
+                    <Slider
+                      label={`Color tolerance: ${tolerance}%`}
+                      min={1}
+                      max={40}
+                      value={tolerance}
+                      onChange={(event) =>
+                        setTolerance(Number(event.target.value))
+                      }
+                    />
+                  ) : (
+                    <Slider
+                      label={`Brush size: ${brushSize}%`}
+                      min={1}
+                      max={20}
+                      value={brushSize}
+                      onChange={(event) =>
+                        setBrushSize(Number(event.target.value))
+                      }
+                    />
+                  )}
+
+                  <div className="grid grid-cols-2 gap-2">
+                    <Button
+                      variant="secondary"
+                      disabled={operations.length === 0}
+                      onClick={handleUndo}
+                    >
+                      Undo
+                    </Button>
+                    <Button
+                      variant="secondary"
+                      disabled={operations.length === 0}
+                      onClick={handleResetMask}
+                    >
+                      Reset
+                    </Button>
+                  </div>
+                </div>
+              )}
+
+              <div className="space-y-2 border-t border-[var(--p-border)] pt-4">
+                {editMode === "select-area" ? (
+                  <Button
+                    className="w-full"
+                    disabled={files.length === 0}
+                    onClick={handleDownloadEdited}
+                  >
+                    Download selected result
+                  </Button>
+                ) : !resultFile ? (
+                  <Button
+                    className="w-full"
+                    disabled={files.length === 0 || isExecuting}
+                    onClick={handleRun}
+                  >
+                    {isExecuting ? "Processing..." : "Remove background"}
+                  </Button>
+                ) : (
+                  <Button
+                    className="w-full"
+                    onClick={() => downloadBlob(resultFile.blob, resultFile.name)}
+                  >
+                    Download PNG
+                  </Button>
+                )}
+                {files.length > 0 && (
+                  <Button
+                    variant="secondary"
+                    className="w-full"
+                    disabled={isExecuting}
+                    onClick={() => {
+                      setFiles([]);
+                      setSourceUrl("");
+                      clearResult();
+                    }}
+                  >
+                    Choose another image
+                  </Button>
+                )}
+              </div>
+
+              <div className="space-y-2 border-t border-[var(--p-border)] pt-4">
+                <Button
+                  variant="danger"
+                  className="w-full"
+                  disabled={isExecuting || isClearingCache}
+                  onClick={handleClearModels}
+                >
+                  {isClearingCache ? "Clearing..." : "Clear models"}
+                </Button>
+                <p className="m-0 text-xs leading-relaxed text-[var(--p-muted)]">
+                  Removes downloaded AI models and ONNX runtime files from this
+                  browser.
+                </p>
+                {cacheMessage && (
+                  <p
+                    role="status"
+                    className="m-0 text-xs font-medium text-[var(--p-text)]"
+                  >
+                    {cacheMessage}
+                  </p>
+                )}
+              </div>
+            </div>
+          </Card>
+        </div>
+      </div>
+
+      {warning && pendingOptions && (
+        <div className="fixed inset-0 z-[70] flex items-center justify-center bg-black/50 p-4">
+          <div
+            role="alertdialog"
+            aria-modal="true"
+            className="w-full max-w-md rounded-2xl border border-[var(--p-border)] bg-[var(--p-surface)] p-6"
+          >
+            <h2 className="m-0 text-lg font-semibold text-[var(--p-text)]">
+              One-time download
+            </h2>
+            <p className="my-4 text-sm leading-relaxed text-[var(--p-muted)]">
+              {warning}
+            </p>
+            <div className="flex justify-end gap-2">
+              <Button
+                variant="secondary"
+                onClick={() => {
+                  setWarning(null);
+                  setPendingOptions(null);
+                }}
+              >
+                Cancel
+              </Button>
+              <Button
+                onClick={() => {
+                  const options = pendingOptions;
+                  setWarning(null);
+                  setPendingOptions(null);
+                  void execute(options);
+                }}
+              >
+                Download &amp; run
+              </Button>
+            </div>
+          </div>
+        </div>
+      )}
+    </div>
+  );
+}

src/tools/background-remover/imgly-cache.ts

@@ -0,0 +1,91 @@
+/**
+ * Persistent caching for the self-hosted @imgly model + wasm assets.
+ *
+ * @imgly/background-removal fetches its assets with plain `fetch`, so whether
+ * they persist between runs is at the mercy of the server's Cache-Control
+ * headers. The Vite dev server (and some hosts) send `no-store`/`no-cache`,
+ * which makes the model re-download on every run.
+ *
+ * To make caching deterministic and host-independent, we intercept same-origin
+ * `/imgly/` requests and back them with the Cache Storage API, which we control
+ * explicitly. CacheStorage is shared across the origin, so an asset cached by
+ * the worker (during a run) is visible to the main thread (for the pre-run
+ * download estimate) and vice-versa.
+ */
+export const IMGLY_CACHE_NAME = "plimi-imgly-v1";
+
+type FetchInput = Parameters<typeof fetch>[0];
+
+function urlOf(input: FetchInput): string {
+  if (typeof input === "string") return input;
+  if (input instanceof URL) return input.toString();
+  return input.url;
+}
+
+function isImglyUrl(url: string): boolean {
+  return url.includes("/imgly/");
+}
+
+let installed = false;
+
+/** Route `/imgly/` fetches through Cache Storage. Safe to call multiple times. */
+export function installImglyCache(): void {
+  if (installed) return;
+  installed = true;
+
+  const scope = self as unknown as {
+    fetch: typeof fetch;
+    caches?: CacheStorage;
+  };
+  if (!scope.caches || typeof scope.fetch !== "function") return;
+
+  const original = scope.fetch.bind(scope);
+  scope.fetch = async (input: FetchInput, init?: RequestInit) => {
+    try {
+      const url = urlOf(input);
+      if (isImglyUrl(url)) {
+        const cache = await scope.caches!.open(IMGLY_CACHE_NAME);
+        const hit = await cache.match(url);
+        if (hit) return hit;
+        const res = await original(input, init);
+        if (res.ok) {
+          try {
+            await cache.put(url, res.clone());
+          } catch {
+            // Quota or opaque response — fall through with the live response.
+          }
+        }
+        return res;
+      }
+    } catch {
+      // Any cache failure: fall back to the network below.
+    }
+    return original(input, init);
+  };
+}
+
+/** Whether an `/imgly/` asset is already stored locally (no download needed). */
+export async function isImglyAssetCached(url: string): Promise<boolean> {
+  const scope = self as unknown as { caches?: CacheStorage };
+  if (scope.caches) {
+    try {
+      const cache = await scope.caches.open(IMGLY_CACHE_NAME);
+      return Boolean(await cache.match(url));
+    } catch {
+      // fall through to HTTP-cache probe
+    }
+  }
+  try {
+    const res = await fetch(url, { cache: "only-if-cached", mode: "same-origin" });
+    return res.ok;
+  } catch {
+    return false;
+  }
+}
+
+/** Delete all persisted IMG.LY model and runtime assets for this origin. */
+export async function clearImglyCache(): Promise<boolean> {
+  const scope = globalThis as typeof globalThis & { caches?: CacheStorage };
+  if (!scope.caches) return false;
+  return scope.caches.delete(IMGLY_CACHE_NAME);
+}

src/tools/background-remover/index.ts

@@ -0,0 +1,86 @@
+import { lazy } from "react";
+import type { PlimiPlugin } from "../../core/plugins/plugin-types";
+import { runBackgroundRemover } from "./run";
+import {
+  estimateUncachedDownloadBytes,
+  type BackgroundRemoverOptions,
+} from "./remove";
+import BgWorker from "./worker?worker";
+
+export type { BackgroundRemoverOptions } from "./remove";
+
+const BackgroundRemoverUi = lazy(() => import("./BackgroundRemoverUi"));
+
+function formatMb(bytes: number): string {
+  return `${(bytes / 1024 / 1024).toFixed(0)} MB`;
+}
+
+export const backgroundRemoverPlugin: PlimiPlugin<BackgroundRemoverOptions> = {
+  manifest: {
+    id: "background-remover",
+    name: "Background Remover",
+    description:
+      "Remove the background from any image with AI, entirely in your browser. Your photo is never uploaded.",
+    category: "image",
+    version: "1.0.0",
+    tags: ["image", "background", "remove", "ai", "transparent", "cutout"],
+    input: {
+      type: "files",
+      accept: ["image/png", "image/jpeg", "image/webp"],
+      multiple: false,
+    },
+    output: { type: "files" },
+    offlineReady: true,
+  },
+
+  optionsSchema: {
+    fields: [
+      {
+        type: "select",
+        key: "quality",
+        label: "Quality",
+        defaultValue: "small",
+        options: [
+          { label: "Smallest download (quantized)", value: "small" },
+          { label: "Balanced (FP16)", value: "medium" },
+          { label: "Best quality (FP32)", value: "large" },
+        ],
+      },
+      {
+        type: "boolean",
+        key: "useGpu",
+        label: "Use GPU (WebGPU) when available",
+        defaultValue: true,
+      },
+    ],
+  },
+
+  capabilities: {
+    cancelable: false,
+    worker: true,
+    persistentWorker: true,
+    wasm: true,
+    customUi: true,
+    preview: true,
+  },
+
+  getRunWarning: async (_input, options) => {
+    const bytes = await estimateUncachedDownloadBytes(options, self.location.origin);
+    if (bytes <= 0) return null;
+    const label =
+      options.quality === "small"
+        ? "Smallest download"
+        : options.quality === "medium"
+          ? "Balanced"
+          : "Best quality";
+    return (
+      `Running the “${label}” model needs a one-time download of about ` +
+      `${formatMb(bytes)} to your device. It is cached afterwards, so future ` +
+      `runs are instant and fully offline. Continue?`
+    );
+  },
+
+  run: runBackgroundRemover,
+  worker: () => new BgWorker(),
+  customUi: BackgroundRemoverUi,
+};

src/tools/background-remover/remove.test.ts

@@ -0,0 +1,42 @@
+import { describe, expect, it, vi } from "vitest";
+import { createBackgroundRemovalProgress } from "./remove";
+
+describe("background remover progress", () => {
+  it("aggregates resource downloads without resetting the percentage", () => {
+    const report = vi.fn();
+    const progress = createBackgroundRemovalProgress(
+      new Map([
+        ["/models/isnet_quint8", 80],
+        ["/onnxruntime-web/ort.wasm", 20],
+      ]),
+      report
+    );
+
+    progress("fetch:/models/isnet_quint8", 40, 80);
+    progress("fetch:/models/isnet_quint8", 80, 80);
+    progress("fetch:/onnxruntime-web/ort.wasm", 10, 20);
+    progress("compute:decode", 0, 4);
+    progress("compute:inference", 1, 4);
+    progress("compute:encode", 4, 4);
+
+    const percentages = report.mock.calls.map(
+      ([value]) => value.percentage as number
+    );
+    expect(percentages).toEqual([...percentages].sort((a, b) => a - b));
+    expect(percentages.at(-1)).toBe(100);
+  });
+
+  it("uses the full progress range when the model session is already loaded", () => {
+    const report = vi.fn();
+    const progress = createBackgroundRemovalProgress(new Map(), report);
+
+    progress("compute:decode", 0, 4);
+    progress("compute:inference", 1, 4);
+    progress("compute:mask", 2, 4);
+    progress("compute:encode", 4, 4);
+
+    expect(report.mock.calls.map(([value]) => value.percentage)).toEqual([
+      0, 25, 50, 100,
+    ]);
+  });
+});

src/tools/background-remover/remove.ts

@@ -0,0 +1,194 @@
+import { removeBackground } from "@imgly/background-removal";
+import type { ToolResult } from "../../core/io/output-types";
+import type { ToolProgress } from "../../core/plugins/plugin-types";
+import { installImglyCache, isImglyAssetCached } from "./imgly-cache";
+
+export interface BackgroundRemoverOptions {
+  /** Quality/size trade-off: small=quint8, medium=fp16, large=fp32. */
+  quality: "small" | "medium" | "large";
+  /** Use WebGPU when available (falls back to wasm automatically). */
+  useGpu: boolean;
+}
+
+/**
+ * Self-hosted asset location. The @imgly model + onnxruntime-web wasm files are
+ * mirrored into `public/imgly/` (see scripts/fetch-imgly-assets.mjs) so nothing
+ * is fetched from a third party — the image never leaves the browser.
+ */
+function publicPath(origin: string): string {
+  return new URL("/imgly/", origin).toString();
+}
+
+const MODEL_BY_QUALITY: Record<
+  BackgroundRemoverOptions["quality"],
+  "isnet" | "isnet_fp16" | "isnet_quint8"
+> = {
+  small: "isnet_quint8",
+  medium: "isnet_fp16",
+  large: "isnet",
+};
+
+interface ResourceEntry {
+  size: number;
+  chunks: Array<{ name: string }>;
+}
+type ResourceMap = Record<string, ResourceEntry>;
+
+function resourceKeys(options: BackgroundRemoverOptions): string[] {
+  const wasmBase = options.useGpu
+    ? "/onnxruntime-web/ort-wasm-simd-threaded.jsep"
+    : "/onnxruntime-web/ort-wasm-simd-threaded";
+
+  return [
+    `/models/${MODEL_BY_QUALITY[options.quality]}`,
+    `${wasmBase}.wasm`,
+    `${wasmBase}.mjs`,
+  ];
+}
+
+async function loadResourceMap(base: string): Promise<ResourceMap | null> {
+  try {
+    const res = await fetch(new URL("resources.json", base).toString());
+    if (!res.ok) return null;
+    return (await res.json()) as ResourceMap;
+  } catch {
+    return null;
+  }
+}
+
+export function createBackgroundRemovalProgress(
+  expectedSizes: ReadonlyMap<string, number>,
+  reportProgress?: (progress: ToolProgress) => void
+): (key: string, current: number, total: number) => void {
+  const fetchedByKey = new Map<string, number>();
+  const expectedTotal = [...expectedSizes.values()].reduce(
+    (sum, size) => sum + size,
+    0
+  );
+  let sawFetch = false;
+  let lastPercentage = 0;
+
+  return (key, current, total) => {
+    let percentage: number;
+    let message: string;
+
+    if (key.startsWith("fetch:")) {
+      sawFetch = true;
+      const resourceKey = key.slice("fetch:".length);
+      fetchedByKey.set(resourceKey, Math.min(current, total));
+
+      const fetched = [...fetchedByKey.values()].reduce(
+        (sum, size) => sum + size,
+        0
+      );
+      const knownTotal =
+        expectedTotal > 0
+          ? expectedTotal
+          : [...fetchedByKey.keys()].reduce(
+              (sum, knownKey) =>
+                sum + (knownKey === resourceKey ? total : fetchedByKey.get(knownKey) ?? 0),
+              0
+            );
+
+      percentage = knownTotal > 0 ? (fetched / knownTotal) * 65 : lastPercentage;
+      message = "Loading AI model...";
+    } else if (key.startsWith("compute:")) {
+      const computePercentage = total > 0 ? current / total : 0;
+      percentage = sawFetch
+        ? 65 + computePercentage * 35
+        : computePercentage * 100;
+      message =
+        current === 0 ? "Preparing image..." : "Removing background...";
+    } else {
+      percentage = lastPercentage;
+      message = "Processing...";
+    }
+
+    lastPercentage = Math.max(lastPercentage, Math.min(100, percentage));
+    reportProgress?.({ percentage: lastPercentage, message });
+  };
+}
+
+/**
+ * Estimate how many bytes still need downloading before the tool can run with
+ * the given options. Returns 0 when everything is already cached locally.
+ */
+export async function estimateUncachedDownloadBytes(
+  options: BackgroundRemoverOptions,
+  origin: string
+): Promise<number> {
+  const base = publicPath(origin);
+  const resources = await loadResourceMap(base);
+  if (!resources) return 0;
+
+  let bytes = 0;
+  for (const key of resourceKeys(options)) {
+    const entry = resources[key];
+    if (!entry?.chunks?.length) continue;
+    // Chunks of a resource are fetched together, so the first chunk is a
+    // reliable proxy for whether the whole resource is cached.
+    const firstChunkUrl = new URL(entry.chunks[0].name, base).toString();
+    if (!(await isImglyAssetCached(firstChunkUrl))) {
+      bytes += entry.size;
+    }
+  }
+  return bytes;
+}
+
+export async function removeImageBackground(
+  fileName: string,
+  imageData: Blob | ArrayBuffer | Uint8Array,
+  options: BackgroundRemoverOptions,
+  origin: string,
+  reportProgress?: (progress: ToolProgress) => void
+): Promise<ToolResult> {
+  // Back /imgly/ fetches with Cache Storage so the model persists between runs
+  // regardless of server cache headers.
+  installImglyCache();
+
+  const base = publicPath(origin);
+  const resources = await loadResourceMap(base);
+  const expectedSizes = new Map(
+    resourceKeys(options).flatMap((key) => {
+      const size = resources?.[key]?.size;
+      return size === undefined ? [] : [[key, size] as const];
+    })
+  );
+  const progress = createBackgroundRemovalProgress(
+    expectedSizes,
+    reportProgress
+  );
+
+  const source =
+    imageData instanceof Blob
+      ? imageData
+      : new Blob([
+          (imageData instanceof Uint8Array
+            ? imageData
+            : new Uint8Array(imageData)) as unknown as BlobPart,
+        ]);
+
+  const resultBlob = await removeBackground(source, {
+    publicPath: base,
+    model: MODEL_BY_QUALITY[options.quality],
+    device: options.useGpu ? "gpu" : "cpu",
+    // We already run inside a Web Worker; avoid nested worker proxying.
+    proxyToWorker: false,
+    output: { format: "image/png" },
+    progress,
+  });
+
+  const outName = fileName.replace(/\.[^./\\]+$/, "") + "_no-bg.png";
+
+  return {
+    type: "files",
+    files: [
+      {
+        name: outName,
+        mimeType: "image/png",
+        blob: resultBlob,
+        sizeAfter: resultBlob.size,
+      },
+    ],
+  };
+}

src/tools/background-remover/run.test.ts

@@ -0,0 +1,37 @@
+import { describe, it, expect, vi } from "vitest";
+import { backgroundRemoverPlugin } from "./index";
+import { runBackgroundRemover } from "./run";
+import type { BackgroundRemoverOptions } from "./remove";
+import type { ToolContext } from "../../core/plugins/plugin-types";
+
+const mockContext: ToolContext = {
+  signal: new AbortController().signal,
+  reportProgress: vi.fn(),
+  logger: { info: vi.fn(), warn: vi.fn(), error: vi.fn() },
+};
+
+const options: BackgroundRemoverOptions = { quality: "small", useGpu: true };
+
+describe("Background Remover Plugin", () => {
+  it("should have correct manifest", () => {
+    expect(backgroundRemoverPlugin.manifest.id).toBe("background-remover");
+    expect(backgroundRemoverPlugin.manifest.category).toBe("image");
+    expect(backgroundRemoverPlugin.manifest.input.type).toBe("files");
+    expect(backgroundRemoverPlugin.manifest.output.type).toBe("files");
+  });
+
+  it("should run in a worker with wasm capability", () => {
+    expect(backgroundRemoverPlugin.capabilities?.worker).toBe(true);
+    expect(backgroundRemoverPlugin.capabilities?.persistentWorker).toBe(true);
+    expect(backgroundRemoverPlugin.capabilities?.wasm).toBe(true);
+    expect(backgroundRemoverPlugin.capabilities?.customUi).toBe(true);
+    expect(backgroundRemoverPlugin.worker).toBeDefined();
+    expect(backgroundRemoverPlugin.customUi).toBeDefined();
+  });
+
+  it("should throw if no image is provided", async () => {
+    await expect(
+      runBackgroundRemover({ files: [] }, options, mockContext)
+    ).rejects.toThrow("No image provided.");
+  });
+});

src/tools/background-remover/run.ts

@@ -0,0 +1,26 @@
+import type { ToolInput } from "../../core/io/input-types";
+import type { ToolResult } from "../../core/io/output-types";
+import type { ToolContext } from "../../core/plugins/plugin-types";
+import { removeImageBackground, type BackgroundRemoverOptions } from "./remove";
+
+export async function runBackgroundRemover(
+  input: ToolInput,
+  options: BackgroundRemoverOptions,
+  context: ToolContext
+): Promise<ToolResult> {
+  const files = input.files;
+
+  if (!files || !Array.isArray(files) || files.length === 0) {
+    throw new Error("No image provided.");
+  }
+
+  const file = files[0];
+
+  return removeImageBackground(
+    file.name,
+    file,
+    options,
+    self.location.origin,
+    context.reportProgress
+  );
+}

src/tools/background-remover/worker.ts

@@ -0,0 +1,44 @@
+import type {
+  ToolWorkerRequest,
+  ToolWorkerResponse,
+} from "../../core/plugins/worker-protocol";
+import { removeImageBackground, type BackgroundRemoverOptions } from "./remove";
+
+function post(response: ToolWorkerResponse) {
+  self.postMessage(response);
+}
+
+self.addEventListener(
+  "message",
+  async (e: MessageEvent<ToolWorkerRequest<BackgroundRemoverOptions>>) => {
+    const { id, input, options } = e.data;
+    const files = input.files;
+
+    if (!files || !Array.isArray(files) || files.length === 0) {
+      post({ type: "error", id, error: "No image file provided." });
+      return;
+    }
+
+    try {
+      const file = files[0];
+      const result = await removeImageBackground(
+        file.name,
+        file,
+        options,
+        self.location.origin,
+        (progress) => post({ type: "progress", id, progress })
+      );
+
+      post({ type: "success", id, result });
+    } catch (error) {
+      post({
+        type: "error",
+        id,
+        error:
+          error instanceof Error
+            ? error.message
+            : "Unknown error occurred while removing the background.",
+      });
+    }
+  }
+);

src/tools/image-to-pdf/index.ts

@@ -0,0 +1,71 @@
+import type { PlimiPlugin } from "../../core/plugins/plugin-types";
+import { runImageToPdf } from "./run";
+
+export interface ImageToPdfOptions {
+  pageSize: "fit" | "a4" | "letter";
+  orientation: "auto" | "portrait" | "landscape";
+  margin: number;
+}
+
+export const imageToPdfPlugin: PlimiPlugin<ImageToPdfOptions> = {
+  manifest: {
+    id: "image-to-pdf",
+    name: "Images to PDF",
+    description:
+      "Turn one or more JPG, PNG, or WebP images into a single PDF without uploading them.",
+    category: "pdf",
+    version: "1.0.0",
+    tags: ["image", "pdf", "jpg", "png", "webp", "convert"],
+    input: {
+      type: "files",
+      label: "Images, in page order",
+      description: "Each image becomes one page. Select files in the order you want them to appear.",
+      accept: ["image/jpeg", "image/png", "image/webp"],
+      multiple: true,
+      maxSizeMb: 30,
+      maxFiles: 100,
+    },
+    output: { type: "files" },
+    offlineReady: true,
+  },
+
+  optionsSchema: {
+    fields: [
+      {
+        type: "select",
+        key: "pageSize",
+        label: "Page size",
+        defaultValue: "fit",
+        options: [
+          { label: "Fit each image", value: "fit" },
+          { label: "A4", value: "a4" },
+          { label: "US Letter", value: "letter" },
+        ],
+      },
+      {
+        type: "select",
+        key: "orientation",
+        label: "Orientation",
+        defaultValue: "auto",
+        options: [
+          { label: "Automatic", value: "auto" },
+          { label: "Portrait", value: "portrait" },
+          { label: "Landscape", value: "landscape" },
+        ],
+      },
+      {
+        type: "number",
+        key: "margin",
+        label: "Margin (mm)",
+        defaultValue: 10,
+        min: 0,
+        max: 40,
+        step: 1,
+      },
+    ],
+  },
+
+  capabilities: { cancelable: true },
+  permissions: { network: "none", fileSystem: "read-write" },
+  run: runImageToPdf,
+};

src/tools/image-to-pdf/run.test.ts

@@ -0,0 +1,47 @@
+import { describe, expect, it, vi } from "vitest";
+import { PDFDocument } from "pdf-lib";
+import type { ToolContext } from "../../core/plugins/plugin-types";
+import { imageToPdfPlugin, type ImageToPdfOptions } from "./index";
+import { runImageToPdf } from "./run";
+
+const context: ToolContext = {
+  signal: new AbortController().signal,
+  reportProgress: vi.fn(),
+  logger: { info: vi.fn(), warn: vi.fn(), error: vi.fn() },
+};
+
+const options: ImageToPdfOptions = {
+  pageSize: "fit",
+  orientation: "auto",
+  margin: 10,
+};
+
+const onePixelPng = Uint8Array.from(atob(
+  "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNk+A8AAQUBAScY42YAAAAASUVORK5CYII="
+), (char) => char.charCodeAt(0));
+
+describe("Images to PDF", () => {
+  it("has a local PDF plugin manifest", () => {
+    expect(imageToPdfPlugin.manifest.id).toBe("image-to-pdf");
+    expect(imageToPdfPlugin.manifest.category).toBe("pdf");
+    expect(imageToPdfPlugin.permissions?.network).toBe("none");
+  });
+
+  it("requires at least one image", async () => {
+    await expect(runImageToPdf({ files: [] }, options, context)).rejects.toThrow(
+      "Add at least one image."
+    );
+  });
+
+  it("creates one PDF page per image", async () => {
+    const files = ["first.png", "second.png"].map(
+      (name) => new File([onePixelPng], name, { type: "image/png" })
+    );
+    const result = await runImageToPdf({ files }, options, context);
+    expect(result.type).toBe("files");
+    if (result.type !== "files") throw new Error("Unexpected result");
+    expect(result.files[0].name).toBe("images.pdf");
+    const pdf = await PDFDocument.load(await result.files[0].blob.arrayBuffer());
+    expect(pdf.getPageCount()).toBe(2);
+  });
+});

src/tools/image-to-pdf/run.ts

@@ -0,0 +1,113 @@
+import { PDFDocument } from "pdf-lib";
+import type { ToolInput } from "../../core/io/input-types";
+import type { ToolResult } from "../../core/io/output-types";
+import type { ToolContext } from "../../core/plugins/plugin-types";
+import type { ImageToPdfOptions } from "./index";
+
+const MM_TO_POINTS = 72 / 25.4;
+const PAGE_SIZES = {
+  a4: [595.28, 841.89],
+  letter: [612, 792],
+} as const;
+
+function abortIfNeeded(signal: AbortSignal) {
+  if (signal.aborted) throw new DOMException("Operation cancelled", "AbortError");
+}
+
+async function convertWebpToPng(file: File): Promise<Uint8Array> {
+  const bitmap = await createImageBitmap(file);
+  try {
+    const canvas = document.createElement("canvas");
+    canvas.width = bitmap.width;
+    canvas.height = bitmap.height;
+    const context = canvas.getContext("2d");
+    if (!context) throw new Error("Your browser could not prepare this WebP image.");
+    context.drawImage(bitmap, 0, 0);
+    const blob = await new Promise<Blob>((resolve, reject) =>
+      canvas.toBlob(
+        (value) => (value ? resolve(value) : reject(new Error("Could not convert WebP image."))),
+        "image/png"
+      )
+    );
+    return new Uint8Array(await blob.arrayBuffer());
+  } finally {
+    bitmap.close();
+  }
+}
+
+export async function runImageToPdf(
+  input: ToolInput,
+  options: ImageToPdfOptions,
+  context: ToolContext
+): Promise<ToolResult> {
+  const files = input.files ?? [];
+  if (files.length === 0) throw new Error("Add at least one image.");
+
+  const pdf = await PDFDocument.create();
+  const margin = Math.max(0, Math.min(40, Number(options.margin) || 0)) * MM_TO_POINTS;
+
+  for (let index = 0; index < files.length; index += 1) {
+    abortIfNeeded(context.signal);
+    const file = files[index];
+    context.reportProgress({
+      percentage: (index / files.length) * 95,
+      message: `Adding ${file.name} (${index + 1}/${files.length})...`,
+    });
+
+    let image;
+    if (file.type === "image/jpeg") {
+      image = await pdf.embedJpg(new Uint8Array(await file.arrayBuffer()));
+    } else if (file.type === "image/png") {
+      image = await pdf.embedPng(new Uint8Array(await file.arrayBuffer()));
+    } else if (file.type === "image/webp") {
+      image = await pdf.embedPng(await convertWebpToPng(file));
+    } else {
+      throw new Error(`${file.name} is not a supported JPG, PNG, or WebP image.`);
+    }
+
+    let pageWidth: number;
+    let pageHeight: number;
+    if (options.pageSize === "fit") {
+      pageWidth = image.width + margin * 2;
+      pageHeight = image.height + margin * 2;
+    } else {
+      [pageWidth, pageHeight] = PAGE_SIZES[options.pageSize];
+      const landscape =
+        options.orientation === "landscape" ||
+        (options.orientation === "auto" && image.width > image.height);
+      if (landscape) [pageWidth, pageHeight] = [pageHeight, pageWidth];
+    }
+
+    const usableWidth = Math.max(1, pageWidth - margin * 2);
+    const usableHeight = Math.max(1, pageHeight - margin * 2);
+    const scale = Math.min(usableWidth / image.width, usableHeight / image.height);
+    const width = image.width * scale;
+    const height = image.height * scale;
+    const page = pdf.addPage([pageWidth, pageHeight]);
+    page.drawImage(image, {
+      x: (pageWidth - width) / 2,
+      y: (pageHeight - height) / 2,
+      width,
+      height,
+    });
+  }
+
+  abortIfNeeded(context.signal);
+  context.reportProgress({ percentage: 98, message: "Finishing PDF..." });
+  const bytes = await pdf.save();
+  const blob = new Blob([bytes as unknown as BlobPart], { type: "application/pdf" });
+  context.reportProgress({ percentage: 100, message: "PDF ready." });
+
+  return {
+    type: "files",
+    files: [{
+      name: files.length === 1
+        ? `${files[0].name.replace(/\.[^.]+$/, "")}.pdf`
+        : "images.pdf",
+      mimeType: "application/pdf",
+      blob,
+      sizeBefore: files.reduce((total, file) => total + file.size, 0),
+      sizeAfter: blob.size,
+    }],
+  };
+}

src/tools/pdf-to-docx-ocr/index.ts

@@ -0,0 +1,76 @@
+import type { PlimiPlugin } from "../../core/plugins/plugin-types";
+import { runPdfToDocxOcr } from "./run";
+
+export interface PdfToDocxOcrOptions {
+  language: "eng" | "fra" | "deu" | "spa" | "ita" | "por" | "nld";
+  quality: "standard" | "high";
+  pageBreaks: boolean;
+}
+
+const LANGUAGE_NAMES: Record<PdfToDocxOcrOptions["language"], string> = {
+  eng: "English",
+  fra: "French",
+  deu: "German",
+  spa: "Spanish",
+  ita: "Italian",
+  por: "Portuguese",
+  nld: "Dutch",
+};
+
+export const pdfToDocxOcrPlugin: PlimiPlugin<PdfToDocxOcrOptions> = {
+  manifest: {
+    id: "pdf-to-docx-ocr",
+    name: "PDF to DOCX with OCR",
+    description:
+      "Extract text from scanned or digital PDFs and create an editable Word document entirely on your device.",
+    category: "pdf",
+    version: "1.0.0",
+    tags: ["pdf", "docx", "word", "ocr", "scan", "convert"],
+    input: {
+      type: "files",
+      label: "PDF document",
+      description: "Best for typed documents and clear scans. Handwriting and complex layouts may need cleanup.",
+      accept: ["application/pdf"],
+      multiple: false,
+      maxSizeMb: 100,
+      maxFiles: 1,
+    },
+    output: { type: "files" },
+    offlineReady: false,
+  },
+
+  optionsSchema: {
+    fields: [
+      {
+        type: "select",
+        key: "language",
+        label: "Document language",
+        defaultValue: "eng",
+        options: Object.entries(LANGUAGE_NAMES).map(([value, label]) => ({ value, label })),
+      },
+      {
+        type: "select",
+        key: "quality",
+        label: "OCR quality",
+        defaultValue: "standard",
+        options: [
+          { label: "Standard (faster)", value: "standard" },
+          { label: "High (clearer small text)", value: "high" },
+        ],
+      },
+      {
+        type: "boolean",
+        key: "pageBreaks",
+        label: "Keep PDF page breaks",
+        defaultValue: true,
+      },
+    ],
+  },
+
+  capabilities: { cancelable: true, wasm: true },
+  permissions: { network: "optional", fileSystem: "read-write" },
+  getRunWarning: (_input, options) =>
+    `The ${LANGUAGE_NAMES[options.language]} OCR model may be downloaded to your browser and cached. ` +
+    "Your PDF is never uploaded; page rendering, OCR, and DOCX creation all happen locally.",
+  run: runPdfToDocxOcr,
+};

src/tools/pdf-to-docx-ocr/run.test.ts

@@ -0,0 +1,37 @@
+import { describe, expect, it, vi } from "vitest";
+import type { ToolContext } from "../../core/plugins/plugin-types";
+import { pdfToDocxOcrPlugin, type PdfToDocxOcrOptions } from "./index";
+import { runPdfToDocxOcr } from "./run";
+
+const context: ToolContext = {
+  signal: new AbortController().signal,
+  reportProgress: vi.fn(),
+  logger: { info: vi.fn(), warn: vi.fn(), error: vi.fn() },
+};
+
+const options: PdfToDocxOcrOptions = {
+  language: "eng",
+  quality: "standard",
+  pageBreaks: true,
+};
+
+describe("PDF to DOCX with OCR", () => {
+  it("declares local processing with optional model access", () => {
+    expect(pdfToDocxOcrPlugin.manifest.id).toBe("pdf-to-docx-ocr");
+    expect(pdfToDocxOcrPlugin.capabilities?.wasm).toBe(true);
+    expect(pdfToDocxOcrPlugin.permissions?.network).toBe("optional");
+  });
+
+  it("requires a PDF", async () => {
+    await expect(runPdfToDocxOcr({ files: [] }, options, context)).rejects.toThrow(
+      "Add a PDF document."
+    );
+  });
+
+  it("rejects a non-PDF before starting OCR", async () => {
+    const file = new File(["hello"], "notes.txt", { type: "text/plain" });
+    await expect(runPdfToDocxOcr({ files: [file] }, options, context)).rejects.toThrow(
+      "The selected file is not a PDF."
+    );
+  });
+});

src/tools/pdf-to-docx-ocr/run.ts

@@ -0,0 +1,110 @@
+import type { ToolInput } from "../../core/io/input-types";
+import type { ToolResult } from "../../core/io/output-types";
+import type { ToolContext } from "../../core/plugins/plugin-types";
+import type { PdfToDocxOcrOptions } from "./index";
+
+function abortIfNeeded(signal: AbortSignal) {
+  if (signal.aborted) throw new DOMException("Operation cancelled", "AbortError");
+}
+
+export async function runPdfToDocxOcr(
+  input: ToolInput,
+  options: PdfToDocxOcrOptions,
+  context: ToolContext
+): Promise<ToolResult> {
+  const file = input.files?.[0];
+  if (!file) throw new Error("Add a PDF document.");
+  if (file.type && file.type !== "application/pdf") throw new Error("The selected file is not a PDF.");
+
+  abortIfNeeded(context.signal);
+  context.reportProgress({ percentage: 1, message: "Opening PDF locally..." });
+
+  const [pdfjs, { createWorker }] = await Promise.all([
+    import("pdfjs-dist"),
+    import("tesseract.js"),
+  ]);
+  pdfjs.GlobalWorkerOptions.workerSrc = new URL(
+    "pdfjs-dist/build/pdf.worker.min.mjs",
+    import.meta.url
+  ).toString();
+
+  const loadingTask = pdfjs.getDocument({ data: new Uint8Array(await file.arrayBuffer()) });
+  const pdf = await loadingTask.promise;
+  const pageTexts: string[] = [];
+  const scale = options.quality === "high" ? 2.5 : 1.75;
+
+  const worker = await createWorker(options.language, undefined, {
+    logger: (message) => {
+      if (message.status === "recognizing text" && typeof message.progress === "number") {
+        const completedPages = pageTexts.length;
+        context.reportProgress({
+          percentage: 8 + ((completedPages + message.progress) / pdf.numPages) * 88,
+          message: `Recognizing page ${completedPages + 1} of ${pdf.numPages}...`,
+        });
+      }
+    },
+  });
+
+  const cancelWorker = () => void worker.terminate();
+  context.signal.addEventListener("abort", cancelWorker, { once: true });
+
+  try {
+    for (let pageNumber = 1; pageNumber <= pdf.numPages; pageNumber += 1) {
+      abortIfNeeded(context.signal);
+      context.reportProgress({
+        percentage: 5 + ((pageNumber - 1) / pdf.numPages) * 88,
+        message: `Rendering page ${pageNumber} of ${pdf.numPages} locally...`,
+      });
+
+      const page = await pdf.getPage(pageNumber);
+      const viewport = page.getViewport({ scale });
+      const canvas = document.createElement("canvas");
+      canvas.width = Math.ceil(viewport.width);
+      canvas.height = Math.ceil(viewport.height);
+      const canvasContext = canvas.getContext("2d", { alpha: false });
+      if (!canvasContext) throw new Error("Your browser could not render this PDF page.");
+      await page.render({ canvas, canvasContext, viewport }).promise;
+      abortIfNeeded(context.signal);
+
+      const result = await worker.recognize(canvas);
+      pageTexts.push(result.data.text.trim());
+      page.cleanup();
+      canvas.width = 1;
+      canvas.height = 1;
+    }
+  } finally {
+    context.signal.removeEventListener("abort", cancelWorker);
+    await worker.terminate().catch(() => undefined);
+    await loadingTask.destroy();
+  }
+
+  abortIfNeeded(context.signal);
+  context.reportProgress({ percentage: 97, message: "Building editable DOCX..." });
+  const { Document, Packer, Paragraph } = await import("docx");
+  const children: Array<InstanceType<typeof Paragraph>> = [];
+  pageTexts.forEach((text, pageIndex) => {
+    const lines = text.split(/\r?\n/);
+    lines.forEach((line, lineIndex) => {
+      children.push(new Paragraph({
+        text: line,
+        pageBreakBefore: options.pageBreaks && pageIndex > 0 && lineIndex === 0,
+        spacing: { after: line.trim() ? 120 : 0 },
+      }));
+    });
+  });
+
+  const docxDocument = new Document({ sections: [{ children }] });
+  const blob = await Packer.toBlob(docxDocument);
+  context.reportProgress({ percentage: 100, message: "DOCX ready." });
+
+  return {
+    type: "files",
+    files: [{
+      name: `${file.name.replace(/\.pdf$/i, "")}_ocr.docx`,
+      mimeType: "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
+      blob,
+      sizeBefore: file.size,
+      sizeAfter: blob.size,
+    }],
+  };
+}

src/tools/pdf-watermark/index.ts

@@ -0,0 +1,80 @@
+import type { PlimiPlugin } from "../../core/plugins/plugin-types";
+import { runPdfWatermark } from "./run";
+import { COLOR_PRESETS, MAX_WATERMARK_CHARS } from "./watermark";
+import PdfWorker from "./worker?worker";
+
+export interface PdfWatermarkOptions {
+  text: string;
+  orientation: "horizontal" | "vertical" | "diagonal";
+  opacity: number;
+  color: string;
+}
+
+export const pdfWatermarkPlugin: PlimiPlugin<PdfWatermarkOptions> = {
+  manifest: {
+    id: "pdf-watermark",
+    name: "PDF Watermark",
+    description:
+      "Stamp custom text over every page of a PDF, entirely in your browser. The text auto-sizes to fit each page.",
+    category: "pdf",
+    version: "1.0.0",
+    tags: ["pdf", "watermark", "stamp", "text"],
+    input: {
+      type: "files",
+      accept: ["application/pdf"],
+      multiple: false,
+    },
+    output: { type: "files" },
+    offlineReady: true,
+  },
+
+  optionsSchema: {
+    fields: [
+      {
+        type: "text",
+        key: "text",
+        label: `Watermark Text (max ${MAX_WATERMARK_CHARS} chars)`,
+        defaultValue: "CONFIDENTIAL",
+        placeholder: "e.g. CONFIDENTIAL",
+      },
+      {
+        type: "select",
+        key: "orientation",
+        label: "Orientation",
+        defaultValue: "diagonal",
+        options: [
+          { label: "Diagonal", value: "diagonal" },
+          { label: "Horizontal", value: "horizontal" },
+          { label: "Vertical", value: "vertical" },
+        ],
+      },
+      {
+        type: "slider",
+        key: "opacity",
+        label: "Opacity (%)",
+        defaultValue: 30,
+        min: 5,
+        max: 100,
+        step: 5,
+      },
+      {
+        type: "select",
+        key: "color",
+        label: "Color",
+        defaultValue: "light-grey",
+        options: Object.entries(COLOR_PRESETS).map(([value, { label }]) => ({
+          label,
+          value,
+        })),
+      },
+    ],
+  },
+
+  capabilities: {
+    cancelable: true,
+    worker: true,
+  },
+
+  run: runPdfWatermark,
+  worker: () => new PdfWorker(),
+};

src/tools/pdf-watermark/run.test.ts

@@ -0,0 +1,95 @@
+import { describe, it, expect, vi } from "vitest";
+import { PDFDocument } from "pdf-lib";
+import { pdfWatermarkPlugin, type PdfWatermarkOptions } from "./index";
+import { runPdfWatermark } from "./run";
+import { MAX_WATERMARK_CHARS } from "./watermark";
+import type { ToolContext } from "../../core/plugins/plugin-types";
+
+const mockContext: ToolContext = {
+  signal: new AbortController().signal,
+  reportProgress: vi.fn(),
+  logger: { info: vi.fn(), warn: vi.fn(), error: vi.fn() },
+};
+
+const defaultOptions: PdfWatermarkOptions = {
+  text: "CONFIDENTIAL",
+  orientation: "diagonal",
+  opacity: 30,
+  color: "light-grey",
+};
+
+async function makePdfFile(): Promise<File> {
+  const doc = await PDFDocument.create();
+  doc.addPage([595, 842]);
+  const bytes = await doc.save();
+  return new File([bytes as unknown as BlobPart], "sample.pdf", {
+    type: "application/pdf",
+  });
+}
+
+describe("PDF Watermark Plugin", () => {
+  it("should have correct manifest", () => {
+    expect(pdfWatermarkPlugin.manifest.id).toBe("pdf-watermark");
+    expect(pdfWatermarkPlugin.manifest.category).toBe("pdf");
+    expect(pdfWatermarkPlugin.manifest.input.type).toBe("files");
+    expect(pdfWatermarkPlugin.manifest.output.type).toBe("files");
+  });
+
+  it("should throw if no file provided", async () => {
+    await expect(
+      runPdfWatermark({ files: [] }, defaultOptions, mockContext)
+    ).rejects.toThrow("No PDF file provided.");
+  });
+
+  it("should throw if watermark text is empty", async () => {
+    const file = await makePdfFile();
+    await expect(
+      runPdfWatermark({ files: [file] }, { ...defaultOptions, text: "  " }, mockContext)
+    ).rejects.toThrow("Watermark text is required.");
+  });
+
+  it("should produce a watermarked PDF", async () => {
+    const file = await makePdfFile();
+    const result = await runPdfWatermark(
+      { files: [file] },
+      defaultOptions,
+      mockContext
+    );
+
+    expect(result.type).toBe("files");
+    if (result.type !== "files") throw new Error("unexpected result");
+    expect(result.files).toHaveLength(1);
+    expect(result.files[0].name).toBe("sample_watermarked.pdf");
+    expect(result.files[0].mimeType).toBe("application/pdf");
+    expect(result.files[0].blob.size).toBeGreaterThan(0);
+
+    // Output should still be a loadable PDF with the same page count.
+    const out = await result.files[0].blob.arrayBuffer();
+    const reloaded = await PDFDocument.load(new Uint8Array(out));
+    expect(reloaded.getPageCount()).toBe(1);
+  });
+
+  it.each(["horizontal", "vertical", "diagonal"] as const)(
+    "should handle %s orientation",
+    async (orientation) => {
+      const file = await makePdfFile();
+      const result = await runPdfWatermark(
+        { files: [file] },
+        { ...defaultOptions, orientation },
+        mockContext
+      );
+      expect(result.type).toBe("files");
+    }
+  );
+
+  it("should truncate text beyond the max length", async () => {
+    const file = await makePdfFile();
+    const longText = "A".repeat(MAX_WATERMARK_CHARS + 50);
+    const result = await runPdfWatermark(
+      { files: [file] },
+      { ...defaultOptions, text: longText },
+      mockContext
+    );
+    expect(result.type).toBe("files");
+  });
+});

src/tools/pdf-watermark/run.ts

@@ -0,0 +1,22 @@
+import type { ToolInput } from "../../core/io/input-types";
+import type { ToolResult } from "../../core/io/output-types";
+import type { ToolContext } from "../../core/plugins/plugin-types";
+import type { PdfWatermarkOptions } from "./index";
+import { applyWatermark } from "./watermark";
+
+export async function runPdfWatermark(
+  input: ToolInput,
+  options: PdfWatermarkOptions,
+  context: ToolContext
+): Promise<ToolResult> {
+  const files = input.files;
+
+  if (!files || !Array.isArray(files) || files.length === 0) {
+    throw new Error("No PDF file provided.");
+  }
+
+  const file = files[0];
+  const buffer = await file.arrayBuffer();
+
+  return applyWatermark(file.name, buffer, options, context.reportProgress);
+}

src/tools/pdf-watermark/watermark.ts

@@ -0,0 +1,149 @@
+import { PDFDocument, StandardFonts, degrees, rgb } from "pdf-lib";
+import type { ToolResult } from "../../core/io/output-types";
+import type { ToolProgress } from "../../core/plugins/plugin-types";
+
+export type WatermarkOrientation = "horizontal" | "vertical" | "diagonal";
+
+export interface PdfWatermarkOptions {
+  text: string;
+  orientation: WatermarkOrientation;
+  /** Opacity from 0 (invisible) to 100 (fully opaque). */
+  opacity: number;
+  /** Preset color key, see COLOR_PRESETS. */
+  color: string;
+}
+
+export const MAX_WATERMARK_CHARS = 60;
+
+export const COLOR_PRESETS: Record<string, { label: string; rgb: [number, number, number] }> = {
+  "light-grey": { label: "Light Grey", rgb: [0.75, 0.75, 0.75] },
+  grey: { label: "Grey", rgb: [0.5, 0.5, 0.5] },
+  black: { label: "Black", rgb: [0, 0, 0] },
+  red: { label: "Red", rgb: [0.86, 0.21, 0.21] },
+  blue: { label: "Blue", rgb: [0.23, 0.4, 0.85] },
+  green: { label: "Green", rgb: [0.2, 0.6, 0.33] },
+};
+
+/** Fraction of the page the watermark may occupy, leaving a safe margin. */
+const FIT_MARGIN = 0.82;
+
+/**
+ * Compute the largest font size at which the rotated text still fits inside the
+ * page, so the watermark is always shown in full without touching the edges.
+ *
+ * A line of text rotated by `angle` occupies an axis-aligned bounding box of:
+ *   width  = |textW·cos| + |textH·sin|
+ *   height = |textW·sin| + |textH·cos|
+ * Both textW and textH scale linearly with font size, so we measure at a probe
+ * size and scale down to satisfy both the width and height constraints.
+ */
+function fitFontSize(
+  measureWidth: (size: number) => number,
+  measureHeight: (size: number) => number,
+  pageW: number,
+  pageH: number,
+  angleRad: number
+): number {
+  const probe = 100;
+  const w = measureWidth(probe);
+  const h = measureHeight(probe);
+  if (w <= 0 || h <= 0) return 12;
+
+  const cos = Math.abs(Math.cos(angleRad));
+  const sin = Math.abs(Math.sin(angleRad));
+
+  const bboxW = w * cos + h * sin;
+  const bboxH = w * sin + h * cos;
+
+  const scaleW = (pageW * FIT_MARGIN) / bboxW;
+  const scaleH = (pageH * FIT_MARGIN) / bboxH;
+
+  const size = probe * Math.min(scaleW, scaleH);
+  return Math.max(6, Math.min(size, 300));
+}
+
+export async function applyWatermark(
+  fileName: string,
+  buffer: ArrayBuffer | Uint8Array,
+  options: PdfWatermarkOptions,
+  reportProgress?: (progress: ToolProgress) => void
+): Promise<ToolResult> {
+  const text = (options.text ?? "").trim().slice(0, MAX_WATERMARK_CHARS);
+  if (!text) {
+    throw new Error("Watermark text is required.");
+  }
+
+  const pdfDoc = await PDFDocument.load(
+    buffer instanceof Uint8Array ? buffer : new Uint8Array(buffer)
+  );
+  const font = await pdfDoc.embedFont(StandardFonts.HelveticaBold);
+
+  const preset = COLOR_PRESETS[options.color] ?? COLOR_PRESETS["light-grey"];
+  const [r, g, b] = preset.rgb;
+  const opacity = Math.max(0, Math.min(1, options.opacity / 100));
+
+  const pages = pdfDoc.getPages();
+  const rotation =
+    options.orientation === "vertical"
+      ? 90
+      : options.orientation === "diagonal"
+        ? 45
+        : 0;
+
+  for (let i = 0; i < pages.length; i++) {
+    const page = pages[i];
+    const { width, height } = page.getSize();
+
+    const angle = (rotation * Math.PI) / 180;
+
+    const fontSize = fitFontSize(
+      (s) => font.widthOfTextAtSize(text, s),
+      (s) => font.heightAtSize(s),
+      width,
+      height,
+      angle
+    );
+    const textWidth = font.widthOfTextAtSize(text, fontSize);
+    const textHeight = font.heightAtSize(fontSize);
+
+    // Place so the (rotated) text is centered on the page.
+    const cx = width / 2;
+    const cy = height / 2;
+    const x = cx - (textWidth / 2) * Math.cos(angle) + (textHeight / 2) * Math.sin(angle);
+    const y = cy - (textWidth / 2) * Math.sin(angle) - (textHeight / 2) * Math.cos(angle);
+
+    page.drawText(text, {
+      x,
+      y,
+      size: fontSize,
+      font,
+      color: rgb(r, g, b),
+      opacity,
+      rotate: degrees(rotation),
+    });
+
+    reportProgress?.({
+      percentage: ((i + 1) / pages.length) * 100,
+      message: `Watermarking page ${i + 1}/${pages.length}...`,
+    });
+  }
+
+  const bytes = await pdfDoc.save();
+  const blob = new Blob([bytes as unknown as BlobPart], {
+    type: "application/pdf",
+  });
+
+  const outName = fileName.replace(/\.pdf$/i, "") + "_watermarked.pdf";
+
+  return {
+    type: "files",
+    files: [
+      {
+        name: outName,
+        mimeType: "application/pdf",
+        blob,
+        sizeAfter: blob.size,
+      },
+    ],
+  };
+}

src/tools/pdf-watermark/worker.ts

@@ -0,0 +1,43 @@
+import type {
+  ToolWorkerRequest,
+  ToolWorkerResponse,
+} from "../../core/plugins/worker-protocol";
+import type { PdfWatermarkOptions } from "./index";
+import { applyWatermark } from "./watermark";
+
+function post(response: ToolWorkerResponse) {
+  self.postMessage(response);
+}
+
+self.addEventListener(
+  "message",
+  async (e: MessageEvent<ToolWorkerRequest<PdfWatermarkOptions>>) => {
+    const { id, input, options } = e.data;
+    const files = input.files;
+
+    if (!files || !Array.isArray(files) || files.length === 0) {
+      post({ type: "error", id, error: "No PDF file provided." });
+      return;
+    }
+
+    try {
+      const file = files[0];
+      const buffer = await file.arrayBuffer();
+
+      const result = await applyWatermark(file.name, buffer, options, (progress) =>
+        post({ type: "progress", id, progress })
+      );
+
+      post({ type: "success", id, result });
+    } catch (error) {
+      post({
+        type: "error",
+        id,
+        error:
+          error instanceof Error
+            ? error.message
+            : "Unknown error occurred while watermarking the PDF.",
+      });
+    }
+  }
+);

vite.config.ts

@@ -5,4 +5,16 @@ import tailwindcss from "@tailwindcss/vite";
 // https://vite.dev/config/
 export default defineConfig({
   plugins: [react(), tailwindcss()],
+  server: {
+    headers: {
+      "Cross-Origin-Opener-Policy": "same-origin",
+      "Cross-Origin-Embedder-Policy": "require-corp",
+    },
+  },
+  preview: {
+    headers: {
+      "Cross-Origin-Opener-Policy": "same-origin",
+      "Cross-Origin-Embedder-Policy": "require-corp",
+    },
+  },
 });