KOReader

Ebook reader Source

Description

KOReader is an ebook reader optimized for e-ink screens. It can open many formats and provides advanced text adjustments.

See below for a selection of its many features:

Supports both fixed page formats (PDF, DjVu, CBT, CBZ) and reflowable e-book formats (EPUB, FB2, Mobi, DOC, CHM, TXT, HTML). Scanned PDF/DjVu documents can be reflowed. Special flow directions for reading double column PDFs and manga.
Multi-lingual user interface optimized for e-ink screens. Highly customizable reader view with complete typesetting options. Multi-lingual hyphenation dictionaries are bundled in.
Non-Latin script support for books, including the Hebrew, Arabic, Persian, Russian, Chinese, Japanese and Korean languages.
Unique Book Map and Page Browser features to navigate your book.
Special multi-page highlight mode with many local and online export options.
Can synchronize your reading progress across all your KOReader running devices.
Integrated with Calibre, Wallabag, Wikipedia, Google Translate and other content providers.

Source

Project links:

Links with more information:

https://github.com/koreader/koreader/wiki

Links to (pages with) screenshots:

Rating

Mobile Fit: 5

Perfect - this app fits your phone screen just fine out of the box and works nicely with touch input!

Project status: released

This project has been developed so far, that its authors felt confident enough to create a release.

The project repository was created on 2013-03-24.

The last known commit happened on 2025-10-04.
Please note: This information is not updated continuously. This particular listing was last updated on 2025-10-05

Features

Connectivity: This app works better with a continous internet connection, but does not require it.

✔ This app is (according to its appstream metadata or description) intended to be compatible with mobile devices.

Packaging

Is this app packaged for my distribution?

green: current and packaged,
red: packaged, but not current, ratings and other details may not apply.

Get it on Flathub!

Install as flatpak: https://flathub.org/apps/rocks.koreader.KOReader.flatpakref

If you're lucky*, you can install this app by just hitting this button:

Install

* You need to have an appstream:// handler, e.g., GNOME Software or KDE Discover, installed and the app needs to be available in a configured software repository, more details.

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Licensing and technical details

License: AGPL-3.0-only Metadata: CC0-1.0

Frameworks: SDL

Backend: mupdf

Programming languages: Lua

Build system: cmake

AppStream Metadata URL: https://raw.githubusercontent.com/koreader/koreader/master/platform/common/koreader.metainfo.xml