| pdf-lib (Cantoo fork, @cantoo/pdf-lib) | MIT |
| PDF.js (pdfjs-dist) | Apache-2.0 |
| libheif-js 1.23.5 (HEIC decoder, loaded only on the HEIC to PDF page as a separate file you can replace) | LGPL-3.0 |
| libheif (inside libheif-js) | LGPL-3.0 |
| libde265 (inside libheif-js) | LGPL-3.0 |
| OpenJPEG (JPEG 2000 decoder used by PDF.js) | BSD-2-Clause |
| JBIG2 decoder from PDFium (used by PDF.js) | BSD-3-Clause |
| qcms color management (used by PDF.js) | MIT |
| Foxit standard fonts (bundled with PDF.js) | BSD-3-Clause |
| Liberation fonts (bundled with PDF.js) | SIL Open Font License 1.1 |
| fontkit (Cantoo fork, @cantoo/fontkit) 2.0.12 | MIT |
| brotli, dfa, fflate and restructure (used by fontkit) | MIT |
| DejaVu fonts 2.37 (embedded in PDFs made from text, HTML and Markdown, and in watermarks, page numbers and forms) | Bitstream Vera Fonts license (DejaVu changes public domain) |
| markdown-it 15.0.2 (Markdown to PDF) | MIT |
| linkify-it, mdurl, uc.micro and punycode.js (used by markdown-it) | MIT |
| entities (used by markdown-it) | BSD-2-Clause |
| DOMPurify 3.4 (cleans pasted HTML; used under the Apache-2.0 option of its dual license) | Apache-2.0 |
| UTIF.js (utif2) 4.1.0 (TIFF to PDF) | MIT |
| pako 1.0.11 (used by UTIF.js) | MIT and Zlib |
| docx-preview 0.4.1 (Word to PDF) | Apache-2.0 |
| docx 9.10.0 (PDF to Word; with JSZip under its MIT option) | MIT |
| postal-mime 4.0.5 (Email to PDF) | MIT-0 |
| msgreader 1.28.0, with decompressrtf (BSD-2-Clause) and iconv-lite (MIT) (Email to PDF) | Apache-2.0 |
| node-forge 1.4.0 (Digital Signature PDF; used under its BSD option, for reading certificates and signing only) | BSD-3-Clause |
| jsdiff (diff) 9.0.0 (Compare PDF files) | BSD-3-Clause |
| pixelmatch 8.0.0 (Compare PDF files) | ISC |
| PptxGenJS 4.0.1 (PDF to PowerPoint; with JSZip under its MIT option) | MIT |
| JSZip 3.10 (used by docx-preview; used under the MIT option of its dual license) | MIT |
| SheetJS Community Edition 0.20.3, from the SheetJS distribution (Excel to PDF, for .xls, .ods and .csv) | Apache-2.0 |
| tesseract.js 7.0.0 and tesseract.js-core 7.0.0 (OCR PDF) | Apache-2.0 |
| Tesseract trained data, tessdata_best int (English, Spanish, French, German, Italian, Portuguese, Russian; OCR PDF) | Apache-2.0 |
| lie, setimmediate and readable-stream (used by JSZip) | MIT |
| Carlito, Arimo, Tinos and Cousine fonts (Word to PDF), via Fontsource 5.3 | SIL Open Font License 1.1 |
| Caladea 1.002 font (Word to PDF, PDF to PDF/A), copyright 2012 Huerta Tipografia | Apache License 2.0 |
| Liberation Sans, Serif and Mono 2.1.4 fonts (PDF to PDF/A), copyright 2010 Google Corporation and 2012 Red Hat, Inc. | SIL Open Font License 1.1 |
| Carlito 1.103 font (PDF to PDF/A), copyright 2010 to 2013 tyPoland Lukasz Dziedzic | SIL Open Font License 1.1 |
| qrcode-generator 2.0.4 by Kazuhiko Arase (QR codes on business cards) | MIT |
| Noto Sans SC and Noto Sans KR fonts (Chinese, Japanese and Korean text in PDFs made from HTML, text, email, ebooks and Office files), via Fontsource 5.3 | SIL Open Font License 1.1 |
| IBM Plex Sans, IBM Plex Mono, Source Serif 4, Libre Franklin, EB Garamond, Cormorant Garamond, Cinzel, Bodoni Moda, Barlow Condensed, Public Sans, Fredoka, Pinyon Script and UnifrakturMaguntia fonts (document maker designs), via Fontsource 5.3 | SIL Open Font License 1.1 |
| Tabler Icons 3.49 (icons across the site, copied into each page as inline SVG) | MIT License |
| Public Sans font (site text and controls), via Fontsource 5.3 | SIL Open Font License 1.1 |
| Schibsted Grotesk font (site headings), via Fontsource 5.3 | SIL Open Font License 1.1 |
| Dancing Script, Great Vibes and Caveat fonts (typed signatures in Sign PDF), via Fontsource 5.3 | SIL Open Font License 1.1 |
| Astro | MIT |
