KOReader
An ebook reader application supporting PDF, DjVu, EPUB, FB2 and many more formats, running on Cervantes, Kindle, Kobo, PocketBook and Android devices observed · 2026-10-20
Health v2 · maintenance only
87/100
- Activity 100
- Release rhythm 64
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-10-21. Adoption (stars, forks) is never an input.
- gap_med: 130.0
- age_days: 4958
- days_rel: 80
- days_push: 1
- n_releases_24m: 7
Adoption not part of the score
30448 stars · 1983 forks observed · 2026-10-20
What it is AI-extracted, prompt v1, taxonomy v1, 2026-10-05, confidence 0.97
KOReader is an open‑source document viewer optimized for e‑ink devices. It supports a wide range of formats including PDF, EPUB, DjVu, FB2 and many more.
Use cases
- Read PDF and EPUB books on a Kindle or Kobo e‑ink reader
- View DjVu, CBZ, and other comic formats on an Android tablet
- Open and reflow scanned PDFs on a Linux desktop for easier reading
- Sync e‑books with Calibre or Wallabag for library management
- Use built‑in dictionary and translation tools while reading on an e‑ink device
When to choose
- You need a free, community‑maintained reader that works on multiple e‑ink devices.
- Your workflow requires support for many document formats and reflow of scanned PDFs.
- You prefer a highly customizable UI with options for fonts, margins, and hyphenation.
When to avoid
- You require a native Windows or macOS application with full GUI integration.
- You need advanced annotation features not yet implemented in KOReader.
- You prefer a commercial solution with dedicated support.
Facets
application · maturity active
pdf-viewer file-system developer-tools education embedded cross-platform e-ink kobo kindle reflow multi-format open-source lua ebook-reader reading linux android
3 sources
- readme: https://github.com/koreader/koreader · fetched 2026-10-20 · 480b0f413cda
- homepage: http://koreader.rocks/ · fetched 2026-09-21 · 71278cdcb717
- site_page: http://koreader.rocks/doc · fetched 2026-09-21 · 52a375d41eb9
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| koreader/koreader | main | 87 |
| koreader/koreader-base | backend | 77 |
| koreader/android-luajit-launcher | infra | 68 |
For agents
markdown · JSON · MCP: product_card(name="koreader/koreader")
Data as of 2026-10-19T08:05:51.212177+00:00 · Report a problem