# PaperKnife A privacy-first PDF utility: merge, compress, sign, and protect. Works 100% offline — no servers, no trackers. [](https://github.com/potatameister/PaperKnife/releases/latest) [](https://potatameister.github.io/PaperKnife/) [](LICENSE) --- ## Screenshots

--- ## Features - Merge & split PDFs - Compress with quality presets - Password protect and unlock PDFs - Convert PDF pages to images (JPG/PNG, 72–300 DPI) - Draw, upload, and reuse signatures - Watermarks, page numbers, metadata cleaning - Deep OCR text extraction (full version only) - And more! All processing happens on your device. Your files never leave your phone. --- ## Download Get the latest APK: [PaperKnife v1.1.0](https://github.com/potatameister/PaperKnife/releases/latest) - **Full** (GitHub releases): everything, including offline OCR. - **Lite** (IzzyOnDroid): same app without the OCR engine — smaller download. [](https://apt.izzysoft.de/packages/com.paperknife.app) Or use the [live site](https://potatameister.github.io/PaperKnife/) — installable as a PWA for offline access. --- ## Run the web version locally Requirements: **Node.js 22+** and `git`. Everything below runs on your own machine. ```bash git clone https://github.com/potatameister/PaperKnife.git cd PaperKnife npm ci # install dependencies (also used by CI) npm run vendor:ocr # optional, only needed for Deep OCR (one-time) npm run dev # start the local server (http://localhost:3000) ``` Notes: * `npm run vendor:ocr` is **optional** — skip it and everything works except Deep OCR. The engine files (~30 MB) are never committed to git, so a fresh clone cannot do OCR until you run it. Re-running later is safe — it skips what is already there. * `npm run build` produces a static `dist/` folder you can serve with any static host (`npm run preview` to check it locally). No server component exists — it is plain files. * To build the Android APK yourself, you additionally need JDK 21 + Android SDK, then `npx cap sync android` after `npm run build`. The OCR files (if vendored) are bundled into the full APK automatically. --- ## Support [](https://potatameister.github.io/support) PaperKnife is a solo project — open-source, ad-free, and tracker-free. All support options live on the [support page](https://potatameister.github.io/support). If it saved you time or kept your data safe: chip in, star the repo, or share it with anyone who handles sensitive documents. --- ## License GNU AGPL v3 — free forever, auditable by anyone. --- *Made with care by [potatameister](https://github.com/potatameister)*