Koreader
Koreader is a free, open-source PDF tool for macOS and Linux. An ebook reader application supporting PDF, DjVu, EPUB, FB2 and many more formats, running on Cervantes, Kindle, Kobo, PocketBook and Android devices. It has 30,673 GitHub stars and is released under the AGPL-3.0 license.
github.com/koreader/koreader (opens in a new tab)
Data as of from the GitHub API; description from the project's repository. Report an error
About Koreader
Please check the user guide and the [wiki][link-wiki] to discover more features and to help us document them. Please follow the model specific steps for your device:
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Is Koreader free and open source?
Yes. Koreader's source code is public on GitHub under the AGPL-3.0 license, which is OSI-approved or FSF-free, so you can use, copy and change it for free.
How do I install Koreader?
Download the installer for macOS and Linux from its GitHub Releases page (latest: v2026.07.1).
Is Koreader still maintained?
The repository's most recent commit was on Oct 27, 2026. appsgit only lists apps whose repository had a commit in the last six months.