Open source licenses
PDF Kept is built on open source software. Every library below is used under a license that permits commercial use. Thank you to the maintainers.
| Library | License | Used for |
|---|---|---|
| @cantoo/pdf-lib 2.11.1 Copyright © Andrew Dillon and pdf-lib contributors; fork maintained by Cantoo | MIT | Creating and modifying PDF documents, including AES password protection |
| pdfjs-dist (PDF.js) 6.4.299 Copyright © Mozilla Foundation and PDF.js contributors | Apache-2.0 | Rendering PDF pages and reading document structure in the browser |
| @cantoo/fontkit 2.0.12 Copyright © Devon Govett and fontkit contributors | MIT | Embedding custom fonts for watermarks and page numbers |
| fflate 0.8.3 Copyright © Arjun Barrett | MIT | Packaging multiple output files into a zip archive |
| signature_pad 5.1.4 Copyright © Samuel Corder | MIT | Capturing handwritten signatures on a canvas |
| Astro 5.x Copyright © Astro contributors | MIT | Static site generation |
| React 19.x Copyright © Meta Platforms, Inc. and affiliates | MIT | Interactive tool interfaces |
| Tailwind CSS 4.x Copyright © Tailwind Labs, Inc. | MIT | Styling |
| Lucide 1.x Copyright © Lucide contributors | ISC | Interface icons |
| astro-icon 1.x Copyright © Nate Moore | MIT | Build-time icon rendering |
| Inter (font) 4.x Copyright © The Inter Project Authors | OFL-1.1 | Typography, self-hosted |
Full license texts are distributed with each package and are available in the project repository. If you believe a notice is missing or incorrect, contact us at xiyanit@gmail.com.