Calibre
E-book library manager that can view, convert, and catalog e-books in most of the major e-book formats and provides a built-in Web server for remote clients.
- E-books
- Python
- GPL-3.0
- Actively maintained
GitHub stats
- GitHub stars
- 26,071
- Forks
- 2,708
- Open issues
- 0
- Commits, last 12 months
- 2,554
- Last commit
- Oct 5, 2026
- Latest release
- v9.15.0Sep 18, 2026
- Created
- May 28, 2013
Data from the GitHub API, refreshed daily.
About Calibre
E-book library manager that can view, convert, and catalog e-books in most of the major e-book formats and provides a built-in Web server for remote clients. Calibre is open source under the GPL-3.0 license and written mainly in Python, so you can read the code, run it on your own hardware and keep full control of your data.
The project has 26,071 stars and 2,708 forks on GitHub, with 2,554 commits over the last year. It installs natively rather than through an official Docker image, so plan for a short manual setup.
Topics
- ebook-manager
- calibre
- python
- ebook
- ebooks
- ebook-reader
- ebook-formats
- epub
- kindle
- epub-generation
Open-source alternative to
Calibre can replace these commercial products. Compare every option on each page.
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What is Calibre?
Calibre is a free, open-source app you can host on your own server, listed in our E-books category. E-book library manager that can view, convert, and catalog e-books in most of the major e-book formats and provides a built-in Web server for remote clients. The source code lives at github.com/kovidgoyal/calibre, where it has 26,071 stars.
Is Calibre free and open source?
Yes. Calibre is open-source software released under the GPL-3.0 license, so you can self-host it at no cost. You only pay for the server it runs on, and some projects also offer an optional paid cloud plan.
Can I run Calibre with Docker?
Calibre does not list an official Docker image. It installs natively (Python and deb), so follow the install steps in its README or look for a community-maintained container.
What are the best alternatives to Calibre?
Popular open-source alternatives to Calibre include Calibre Web, Audiobookshelf and Kavita. Calibre itself is a self-hosted alternative to Kindle and Calibre Cloud.
Is Calibre actively maintained?
The most recent commit to Calibre was on Oct 5, 2026 with 2,554 commits in the past twelve months. The latest release is v9.15.0, published Sep 18, 2026. Check the open issues on GitHub to gauge how quickly maintainers respond.