[](https://koreader.rocks)
#### KOReader is a document viewer primarily aimed at e-ink readers.
[![AGPL Licence][badge-license]](COPYING)
[![Latest release][badge-release]][link-gh-releases]
[![Gitter][badge-gitter]][link-gitter]
[![Mobileread][badge-mobileread]][link-forum]
[![Build Status][badge-circleci]][link-circleci]
[![Coverage Status][badge-coverage]][link-coverage]
[Download ](https://github.com/koreader/koreader/releases ) •
[Wiki ](https://github.com/koreader/koreader/wiki ) •
[Developer docs ](http://koreader.rocks/doc/ )
## Main features
* **portable**: runs on embedded devices (Cervantes, Kindle, Kobo, PocketBook), Android and Linux computers. Developers can run a KOReader emulator in Linux and MacOS.
* **multi-format documents**: supports fixed page formats (PDF, DjVu, CBT, CBZ) and reflowable e-book formats (EPUB, FB2, Mobi, DOC, CHM, TXT). Scanned PDF/DjVu documents can also be reflowed with the built-in K2pdfopt library.
* **full-featured reading**: multi-lingual user interface with a highly customizable reader view and many typesetting options. You can set arbitrary page margins, override line spacing and choose external fonts and styles. It has multi-lingual hyphenation dictionaries bundled into the application.
* **integrated** with *calibre* (search metadata, receive ebooks wirelessly, browse library via OPDS), *Evernote* (export hightlights), *Wallabag* , *Wikipedia* , *Google Translate* and other content providers.
* **optimized for e-ink devices**: custom UI without animation, with paginated menus, adjustable text contrast, and easy zoom to fit content or page in paged media.
* **extensible**: via plugins
* **and much more**: look up words with StarDict dictionaries / Wikipedia, add your own online OPDS catalogs and RSS feeds, share ebooks with other KOReader devices wirelessly, online over-the-air software updates, an FTP client, an SSH server, …
Please check the [wiki][link-wiki] to discover more features and to help us document them.
## Screenshots
< a href = "https://github.com/koreader/koreader-artwork/raw/master/koreader-menu.png" > < img src = "https://github.com/koreader/koreader-artwork/raw/master/koreader-menu-thumbnail.png" alt = "" width = "200px" > < / a >
< a href = "https://github.com/koreader/koreader-artwork/raw/master/koreader-footnotes.png" > < img src = "https://github.com/koreader/koreader-artwork/raw/master/koreader-footnotes-thumbnail.png" alt = "" width = "200px" > < / a >
< a href = "https://github.com/koreader/koreader-artwork/raw/master/koreader-dictionary.png" > < img src = "https://github.com/koreader/koreader-artwork/raw/master/koreader-dictionary-thumbnail.png" alt = "" width = "200px" > < / a >
## Installation
Please follow the model specific steps for your device:
[Android ](https://github.com/koreader/koreader/wiki/Installation-on-Android-devices ) •
[Cervantes ](https://github.com/koreader/koreader/wiki/Installation-on-BQ-devices ) •
[Kindle ](https://github.com/koreader/koreader/wiki/Installation-on-Kindle-devices ) •
[Kobo ](https://github.com/koreader/koreader/wiki/Installation-on-Kobo-devices ) •
[Linux ](https://github.com/koreader/koreader/wiki/Installation-on-desktop-linux ) •
[Pocketbook ](https://github.com/koreader/koreader/wiki/Installation-on-PocketBook-devices )
## Development
[Setting a build environment ](doc/Building.md ) •
[Collaborating with Git ](doc/Collaborating_with_Git.md ) •
[Building targets ](doc/Building_targets.md ) •
[Porting ](doc/Porting.md ) •
[Developer docs ](http://koreader.rocks/doc/ )
## Support
KOReader is developed and supported by volunteers all around the world. There are many ways you can help:
- [fix bugs][link-issues-bugs] and [implement new features][link-issues-features]
- [translate the program into your language][link-translations-transifex] or improve an existing translation
- document lesser-known features on the [wiki][link-wiki]
- help others with your knowledge on the [forum][link-forum]
At this moment we don't support any form of monetary donation, but you can create a [bounty][link-bountysource] for the specific bug or feature request you want and motivate others to do the work.
Also if you have and old Pocketbook device you don't want, we might find it useful to tinker a bit with that platform. Please contact us through the forum or GitHub.
## Contributors
[![Last commit][badge-last-commit]][link-gh-commits]
[![Commit activity][badge-commit-activity]][link-gh-insights]
[](https://sourcerer.io/fame/Frenzie/koreader/koreader/links/0)
[](https://sourcerer.io/fame/Frenzie/koreader/koreader/links/1)
[](https://sourcerer.io/fame/Frenzie/koreader/koreader/links/2)
[](https://sourcerer.io/fame/Frenzie/koreader/koreader/links/3)
[](https://sourcerer.io/fame/Frenzie/koreader/koreader/links/4)
[](https://sourcerer.io/fame/Frenzie/koreader/koreader/links/5)
[](https://sourcerer.io/fame/Frenzie/koreader/koreader/links/6)
[](https://sourcerer.io/fame/Frenzie/koreader/koreader/links/7)
[badge-bountysource]:https://img.shields.io/bountysource/team/koreader/activity?color=red
[badge-circleci]:https://circleci.com/gh/koreader/koreader.svg?style=shield
[badge-coverage]:https://codecov.io/gh/koreader/koreader/branch/master/graph/badge.svg
[badge-commit-activity]:https://img.shields.io/github/commit-activity/m/koreader/koreader
[badge-gitter]:https://img.shields.io/gitter/room/koreader/koreader?color=red
[badge-last-commit]:https://img.shields.io/github/last-commit/koreader/koreader?color=orange
[badge-license]:https://img.shields.io/github/license/koreader/koreader
[badge-release]:https://img.shields.io/github/release/koreader/koreader.svg
[badge-mobileread]:https://img.shields.io/badge/forum-on_mobileread-lightgrey
[link-bountysource]:https://www.bountysource.com/teams/koreader
[link-circleci]:https://circleci.com/gh/koreader/koreader
[link-coverage]:https://codecov.io/gh/koreader/koreader
[link-forum]:http://www.mobileread.com/forums/forumdisplay.php?f=276
[link-gh-commits]:https://github.com/koreader/koreader/commits/master
[link-gh-insights]:https://github.com/koreader/koreader/pulse
[link-gh-releases]:https://github.com/koreader/koreader/releases
[link-gitter]:https://gitter.im/koreader/koreader
[link-issues-bugs]:https://github.com/koreader/koreader/issues?q=is%3Aopen+is%3Aissue+label%3Abug
[link-issues-features]:https://github.com/koreader/koreader/issues?q=is%3Aopen+is%3Aissue+label%3Aenhancement
[link-translations-transifex]:https://www.transifex.com/projects/p/koreader/
[link-wiki]:https://github.com/koreader/koreader/wiki
