LICENSES
Third-party licences
The OKURAZU v2.3.1 candidate bundles the following third-party software and data within the site. Nothing is fetched from a CDN at runtime.
Main libraries
- pdf-lib 1.17.1 (locally patched for safety limits) — MIT — Licence text
- fflate 0.8.3 — MIT — Licence text
- ExifReader 4.44.1 — MPL-2.0 — Licence text
- PDF.js 6.3.289 — Apache-2.0 — Licence text
Data bundled with PDF.js
- CMap data — Licence text
- ICC colour profiles — Licence text
- Foxit standard fonts — Licence text
- Liberation standard fonts — Licence text
WASM bundled with PDF.js
- JBIG2 — Original licence / PDF.js distribution notice
- OpenJPEG — Original licence / PDF.js distribution notice
- QCMS — Original licence / PDF.js distribution notice
HEIC conversion (loaded on demand)
Uses libheif 1.23.3 and libde265 1.1.1 (LGPL v3 or later), the FotoDrop distribution, and a wrapper derived from @keeratita/heic-converter (MIT).
- Full libheif licence / Full libde265 licence
- MIT licence for the wrapper / Emscripten licence
- Corresponding source, changes, and how to rebuild and replace
- libheif corresponding source / libde265 corresponding source
The site's terms do not restrict the modification, redistribution, or reverse engineering for debugging modifications that these licences permit.
The mapping and purpose of each distributed file is also recorded inThird-Party Notices.
Last updated: 7 September 2026 / v2.3.1