Open source epub projects
Every project in the registry tagged epub, ranked by real GitHub adoption.
An ebook reader application supporting PDF, DjVu, EPUB, FB2 and many more formats, running on Cervantes, Kindle, Kobo, PocketBook and Android devices
A modern ebook manager and reader with sync and backup capacities for Windows, macOS, Linux, Android, iOS and Web
The official source code repository for the calibre ebook manager
Readest is a modern, feature-rich ebook reader designed for avid readers offering seamless cross-platform access, powerful tools, and an intuitive interface to
Generate audiobooks from e-books, voice cloning & 1158+ languages!
:books: Web app for browsing, reading and downloading eBooks stored in a Calibre database
PyMuPDF is a high performance Python library for data extraction, analysis, conversion & manipulation of PDF (and other) documents.
Calibre-Web but Automated and with tons of New Features! Fully automate and simplify your eBook set up!
A self-hosted library for your ebooks, comics, and audiobooks
A cross platform desktop reading app, based on the Readium Desktop toolkit
Translate full-length books and documents with Ollama, OpenAI-compatible, Gemini, Mistral, DeepSeek, Poe or OpenRouter. Preserves formatting. Resumes where you
An Open source app to download and read books from shadow library (Anna’s Archive)
A CLI text-to-speech tool using the Kokoro model, supporting multiple languages, voices (with blending), and various input formats including EPUB books and PDF
A versatile Python library for EPUB2/EPUB3 manipulation and processing.
Qt based ebook reader
Manage your ebook library without frustrations. Calibre compatible.
Render e-books in the browser
Any file → clean Markdown for AI agents: PDF, Word, PowerPoint, Excel, EPUB, HTML and web pages, images (OCR), audio and video (metadata, subtitles, transcripts
Booktype is a free, open source platform that produces beautiful, engaging books formatted for print, Amazon, iBooks and almost any ereader within minutes.
Fast, standalone EPUB to Kobo EPUB conversion tool.
📦 Clients for building books with EpubPress.
A toolkit for ebooks, audiobooks and comics written in Swift
An open-source read-along document reader server with high-quality TTS options, synchronized highlighting, and audiobook export for EPUB, PDF, DOCX, TXT, and MD
.NET library for reading EPUB files
Related tags
Frequently asked questions
How many open source epub projects are there?
This registry tracks 24 projects tagged epub, with 193,983 GitHub stars between them. The most-adopted is koreader at 30,818 stars.
Are these epub projects free to use?
Yes — 24 of the 24 carry an explicit open-source licence across 6 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which epub project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these epub projects still maintained?
18 of the 24 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.