PageJoyOpen-source Licences
Last updated: 4 October 2026
PageJoy uses open-source software, including libheif and libde265 supplied as separate files. This page identifies those parts and explains where their notices, licence texts and corresponding source can be found.
1. What this page covers
PageJoy provides its tools at pagejoy.app. Some software parts are licensed by their authors under open-source licences. Those licences govern your rights in those parts. Our Terms of Service do not remove those rights.
The complete release inventory is /photo/licences for Photo and the component and notice list below for the other tools. It covers the browser-delivered files, plugin server components, wrappers, dependencies, fonts, assets and any modified code included in release the software and component versions listed on this page, with legal information dated 4 October 2026.
2. Components delivered to your browser
| Component | Version and exact source revision we ship | Licence for the shipped code | Copyright notices | Modifications | Files shipped |
|---|---|---|---|---|---|
| libheif | 1.23.2, revision ac1cb05c39008f01525c991ff8b88f84ddf70fd2 | LGPL-3.0-or-later | complete libheif notices, including the authors identified in the exact source tree | unmodified supplied runtime, loaded as a separate file | libheif.js and libheif.wasm, with the libheif-js wrapper |
| libde265 | 1.0.15, source tag v1.0.15 pinned by build revision dd5a19b878149437a5a427f6e1afa8bac624a714 | LGPL-3.0-or-later | complete libde265 notices, including the authors identified in the exact source tree | unmodified supplied runtime, loaded as a separate file | the libde265 decoder in the separate libheif.wasm runtime, plus its licence text |
| Other components | Next.js 16.3.8, React and React DOM 19.3.0, EmbedPDF 2.15.1, Cantoo PDF-lib 2.11.1, fflate 0.8.3, Tesseract.js 7.0.0, UTIF.js 3.1.0, @jsquash/webp 1.5.0 with libwebp 1.1.0; Source Sans 3 and the 22 Templates fonts with their shipped notices | MIT, Apache-2.0, BSD-3-Clause and SIL Open Font Licence as specified in each shipped component notice | PDF tool notice pack, Photo notices, and Templates font notices: Inter, Inter Tight, IBM Plex Mono, Manrope, Work Sans, Source Sans 3, Source Serif 4, IBM Plex Sans, Montserrat, Lato, Noto Sans, Space Grotesk, Fraunces, Nunito, Caveat, Archivo Black, Libre Baskerville, Josefin Sans, Cormorant Garamond, Courier Prime, Quicksand, Patrick Hand | upstream libraries and fonts are supplied under their notices; the application uses them without claiming ownership of upstream code | browser application files, separate Photo runtime files, PDF and OCR runtime assets, fonts and their public licence files. Next.js and account libraries also run on our server |
Upstream projects are libheif and libde265. Their current main-branch library headers specify LGPL version 3 or a later version: libheif header and libde265 header. This identifies current upstream terms. It does not identify the version in our build.
3. Licence texts and notices
The complete licence texts and notices supplied with our release are at PDF tool notice pack, Photo notices, and Templates font notices: Inter, Inter Tight, IBM Plex Mono, Manrope, Work Sans, Source Sans 3, Source Serif 4, IBM Plex Sans, Montserrat, Lato, Noto Sans, Space Grotesk, Fraunces, Nunito, Caveat, Archivo Black, Libre Baskerville, Josefin Sans, Cormorant Garamond, Courier Prime, Quicksand, Patrick Hand. They are also included in browser application files, separate Photo runtime files, PDF and OCR runtime assets, fonts and their public licence files. Next.js and account libraries also run on our server with the distributed software.
For reference, the current upstream COPYING files are libheif COPYING and libde265 COPYING. Each distinguishes its library from some separately licensed supporting code and contains the LGPL version 3 text and the GPL version 3 text which it incorporates.
Templates true italic fonts
Templates includes 32 self-hosted italic and bold italic files under SIL Open Font Licence 1.1. The existing 44 upright font files are unchanged. The italic font inventory records each shipped file, its SHA-256, exact upstream source and licence hash. The complete licence texts for the 16 families are linked below.
4. Corresponding source for our release
The corresponding source for the exact libheif files we distribute is https://github.com/strukturag/libheif/tree/ac1cb05c39008f01525c991ff8b88f84ddf70fd2. The corresponding source for the exact libde265 files we distribute is https://github.com/strukturag/libde265/tree/v1.0.15.
Our source packages include the exact upstream library source, pinned wrapper and build scripts linked on Photo software licences, including Emscripten 3.1.61 build settings, with our changes identified in the component notices and exact source references on /photo/licences; the supplied Photo runtime is unmodified. The source and build instructions are tied to the software and component versions listed on this page, with legal information dated 4 October 2026.
If a link is unavailable, contact support@pagejoy.app and identify the component and release. Our approved alternative source-supply arrangement is we help restore access to the exact source links or provide the required corresponding material through support; this contact route is not represented as a formal written source offer.
5. Replacing or relinking LGPL components
The LGPL protects the ability to modify its libraries. LGPL version 3 section 4 sets conditions for combined works, including notices, licence delivery and either a suitable shared-library arrangement or material that permits recombination or relinking. Installation information may also be required in the circumstances described by that licence.
Our instructions for replacing or relinking the browser libraries are /photo/licences, including the exact runtime, source and build links and instructions for an interface-compatible replacement. The files needed for the approved route are /photo/licences, including the exact runtime, source and build links and instructions for an interface-compatible replacement. Any required installation instructions are /photo/licences, including the exact runtime, source and build links and instructions for an interface-compatible replacement.
To the extent the applicable LGPL requires it, our terms permit modifying the covered library portions and reverse engineering to debug those modifications. Other open-source rights also remain available under their licences.
6. Warranties and other rights
The relevant open-source licence states the authors' warranty terms for their code. Those terms do not remove statutory consumer rights against the supplier of PageJoy, or commitments that we separately make under our service terms.
Codec patent rights and other third-party rights can be separate from an open-source copyright licence.
7. Questions
Contact support@pagejoy.app if you cannot find a notice, licence text or source package for a release. Include the component name, version if known and the PageJoy release you used.