Under the hood
Open-source licenses.
pdfconva uses no paid AI and no third-party conversion APIs. Everything below is open source; thank you to the people who maintain it.
| Library | License | Used for |
|---|---|---|
| Next.js, React | MIT | The web application |
| Tailwind CSS | MIT | Styling |
| Radix UI, shadcn/ui | MIT | Accessible UI primitives |
| Motion (Framer Motion) | MIT | Animation |
| pdf-lib | MIT | Merge, split, rotate, stamp, number |
| PDF.js | Apache-2.0 | Rendering page thumbnails and images |
| JSZip | MIT or GPL-3.0 | Bundling several results into a ZIP |
| dnd-kit | MIT | Drag to reorder files and pages |
| vaul | MIT | The bottom sheet on phones |
| sonner | MIT | Toasts |
| qpdf, pikepdf, pypdf | Apache-2.0 / MPL-2.0 / BSD | Compression and encryption on the server |
| Ghostscript | AGPL-3.0 | Deep compression and PDF/A on the server |
| LibreOffice | MPL-2.0 | Office document conversion on the server |
| OCRmyPDF, Tesseract | MPL-2.0 / Apache-2.0 | OCR on the server |
| Playwright | Apache-2.0 | Web page to PDF on the server; end-to-end tests |
| Bricolage Grotesque, Noto Sans Bengali | OFL-1.1 | Typefaces |