Thorium Reader
Thorium Reader is a free, open-source education and reference app for Windows, macOS and Linux. A cross platform desktop reading app, based on the Readium Desktop toolkit. It has 2,896 GitHub stars and is released under the BSD-3-Clause license. Its source code is on GitHub at edrlab/thorium-reader.
- Linux
- macOS
- Windows
- Education, flashcards & reference
- Actively maintained
About Thorium Reader
Thorium Reader is an easy to use EPUB reading application for Windows 10/10S, MacOS and Linux. After importing e-books from a directory or OPDS feed, you'll be able to read on any screen size, customize layout settings, navigate via the table of contents or page list, set bookmarks... A great care is taken to ensure the accessibility of the application for visual impaired people using NVDA, JAWS or Narrator.
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What is Thorium Reader?
Thorium Reader is a free, open-source education and reference app for Windows, macOS and Linux. A cross platform desktop reading app, based on the Readium Desktop toolkit. It has 2,896 GitHub stars and is released under the BSD-3-Clause license. Its source code is on GitHub at edrlab/thorium-reader.
Is Thorium Reader free and open source?
Yes. Thorium Reader's source code is public on GitHub under the BSD-3-Clause license, which is OSI-approved or FSF-free, so you can use, copy and change it for free.
How do I install Thorium Reader?
Download the installer for Windows, macOS and Linux from its GitHub Releases page (latest: v3.5.1) or the project website.
Is Thorium Reader still maintained?
The repository's most recent commit was on Oct 7, 2026. appsgit only lists apps whose repository had a commit in the last six months.