kovidgoyal/calibre
The official source code repository for the calibre ebook manager observed · 2026-08-28
Health v2 · maintenance only
98/100
- Activity 99
- Release rhythm 96
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: 13.0
- age_days: 4845
- days_rel: 27
- days_push: 7
- n_releases_24m: 49
Adoption not part of the score
25734 stars · 2657 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
calibre is a free, open-source, cross-platform e-book management application written in Python. It can view, convert, edit, and catalog e-books in all major formats, sync with e-reader devices, fetch metadata online, and download news as e-books.
Use cases
- manage a large personal ebook library with tags and metadata
- convert epub to kindle mobi or azw3 format
- transfer ebooks to my e-reader device over usb or wireless
- edit epub files and fix metadata or covers
- download news articles and convert them into an ebook
- read ebooks on my computer with a built-in viewer
- fetch book metadata and covers automatically from the internet
When to choose
- you need a comprehensive desktop tool to organize, convert, and sync an ebook collection
- you want format conversion between epub, mobi, azw3, pdf and other ebook formats
- you need to manage and transfer books to many different e-reader devices
- you want a free, open-source, actively maintained ebook manager
When to avoid
- you only need a lightweight mobile or web-based reading app without library management
- you need DRM-protected ebook handling, which calibre does not support
- you want a server-first multi-user ebook streaming service rather than a desktop application
Facets
application · maturity stable
gui file-system templating http-server pdf internationalization files pdf cross-platform developer-tools media windows cross-platform python ebook-manager ebook-conversion ebook-reader epub kindle library-catalog metadata-fetching news-download linux macos desktop
3 sources
- readme: https://github.com/kovidgoyal/calibre · fetched 2026-08-28 · 222de55e3cce
- homepage: https://calibre-ebook.com · fetched 2026-08-29 · 28d76c002687
- site_page: https://calibre-ebook.com/about · fetched 2026-08-29 · a5fe6e808f70
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| kovidgoyal/calibre | main | 98 |
For agents
markdown · JSON · MCP: product_card(name="kovidgoyal/calibre")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem