Vendored third-party libraries (for /pdftools/)

These are pinned, locally-served copies so the PDF toolbench runs fully offline with no CDN/network calls (privacy + the site’s no-external-deps ethos). Downloaded, not hotlinked.

pdf-lib — pdf-lib.min.js

• Version 1.17.1
• License: MIT — https://github.com/Hopding/pdf-lib/blob/master/LICENSE.md
• Used for structural PDF editing (merge, split, reorder, rotate, delete pages, embed images for signatures and rasterized redaction, strip metadata). Exposes window.PDFLib.

pdf.js — pdfjs/pdf.min.js, pdfjs/pdf.worker.min.js

• Version 3.11.174 (legacy UMD build)
• License: Apache License 2.0 — https://github.com/mozilla/pdf.js/blob/master/LICENSE (the full license notice is retained in the minified file headers)
• Mozilla’s PDF renderer (Firefox’s built-in viewer). Used for DISPLAY ONLY: page thumbnails/previews and rasterizing pages for true redaction. Exposes window.pdfjsLib; the worker is loaded from this local path (never a CDN).

To update: re-download the same files from the upstream release and bump the versions here.