We spent years combining pdf-lib with a custom Rust signing library. It worked, but real-world PDFs kept finding edge cases.
Instead of waiting for a better library to appear, we wrote our own.
LibPDF:
- Lenient parsing with brute-force recovery (inspired by Apache PDFBox) - Digital signatures with no native bindings and full PAdES support - Incremental saves that preserve existing signatures - Encryption (AES-256, AES-128, RC4) - TTF/OTF font subsetting (ported from PDFBox's fontbox)
API inspired by pdf-lib.
Still in beta, but we use it in production at Documenso already. You might hit a few bugs that we haven't yet, if you do let us know!
https://documenso.com/blog/introducing-libpdf-the-pdf-librar... https://github.com/libpdf-js/core https://libpdf.dev