Open-source notices
Sepia Books uses the following open-source software. The list is maintained alongside the running service and updated when a covered dependency is added, removed, or version-bumped.
libheif-js
- Version
- 1.19.8
- Project
- github.com/catdad-experiments/libheif-js (an Emscripten distribution of libheif)
- License
- GNU Lesser General Public License version 3 (LGPL-3.0) — full text
- Use in this service
- Server-side conversion of iPhone HEIC photos to JPEG, used by the photo, email-attachment, book-cover and title-page photo upload paths.
FFmpeg
- Version
- 9.0.2
- Project
- ffmpeg.org — the unmodified 9.0.2 source release, built for WebAssembly with only its video decoders
- License
- GNU Lesser General Public License version 2.1 or later (LGPL-2.1-or-later) — full text
- Use in this service
- Server-side only: a still frame of a video in an imported blog post, so a printed book can show the video as a picture.
Twemoji
- Version
- @twemoji/api 17.0.2
- Project
- github.com/jdecked/twemoji — copyright Twitter, Inc and other contributors
- License
- Creative Commons Attribution 4.0 International (CC-BY 4.0) — license terms
- Use in this service
- Unicode emoji in user-generated content (emails, broadcasts, printed books) are replaced with Twemoji SVG renders so emoji display identically across devices and in print.
pdf-lib
- Version
- 1.17.1
- Project
- github.com/Hopding/pdf-lib
- License
- MIT License — license terms
- Use in this service
- Server-side drawing of the opt-in first-page title label onto imported front-matter PDFs (uploaded front-matter documents) in the printed and digital book pipelines.
WordPress packages
- Version
- @wordpress/autop 4.56.0 · @wordpress/shortcode 4.56.0
- Project
- github.com/WordPress/gutenberg — copyright the WordPress contributors
- License
- GNU General Public License version 2 or later (GPL-2.0-or-later) — license terms
- Use in this service
- Server-side only: when a customer imports a WordPress blog from its export file, its posts get the paragraphs and the captions, galleries and embedded videos WordPress showed their readers. Never sent to a browser.
Lucide
- Version
- No package dependency: the icon shapes are copied into our pages from several releases. License text as of lucide-static 1.57.0
- Project
- github.com/lucide-icons/lucide — Copyright (c) 2026 Lucide Icons and Contributors. The icons derived from Feather: Copyright (c) 2013-present Cole Bemis
- License
- ISC License, with the icons derived from Feather under the MIT License — full text
- Use in this service
- The line icons on our pages, such as the content tiles on Add content and the dashboard, are Lucide shapes drawn inline. Some of them are derived from Feather.
Contact
Questions about a listed dependency or its license should go to our contact page.