KOReader icon
KOReader icon

KOReader

 61 likes

An ebook reader application supporting PDF, DjVu, EPUB, FB2 and many more formats, running on Kindle, Kobo, PocketBook, Linux and Android devices.

KOReader screenshot 1
KOReader screenshot 2
KOReader screenshot 3

License model

  • FreeOpen Source

Application types

Platforms

  • Linux
  • Android
  • AppImageHub
  • Kobo Books
  • Flathub
  • F-Droid
  • Kindle Fire
  • Android Tablet
4.9 / 5 Avg rating (9)
61likes
6comments
0news articles

Features

Suggest and vote on features

Properties

  1.  Lightweight

Features

  1.  Built-in Dictionary
  2.  Ad-free
  3. wallabag icon  Wallabag integration
  4.  Dark Mode
  5. Wikipedia icon  Wikipedia integration
  6.  No Tracking
  7.  OCR
  8.  Portable
  9.  Full-Text Search
  10.  No registration required
  11.  Works Offline
  12.  PDF annotation

 Tags

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Comments and Reviews

   
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Top Positive Comment
sowij
Sep 13, 2020
1

It's a great replacement for the default reader pre-installed on my Pocketbook Touch Lux 4, many customization options, support for a wide range of formats (pdf reflow), custom dictionaries, fonts and more. There are some platform specific issues related to screen suspension on my device and it seems that none of the devs own a Pocktbook themselves, so it may take a while before these get resolved. I can't say how well it holds up on other e-Ink devices by comparison, but overall it is still a step up from what you get out of the box and it gets updated on a monthly basis.

Well, seems like most of the issues I had have been fixed by the latest update. [Edited by sowij, September 21]

llll
Dec 14, 2024
0

it's perfect. reading experience is literally perfect.

on Android it's slow to visually browse huge libraries and can only open files from it's own built-in browser.

danilojlle
Oct 13, 2024
0

It's also an awesome app for Android tablets. You can change the screen's brightness, and make the reading process much closer to an actual E-ink reader.

Álvaro Ayres
Oct 2, 2024
0

The best app for reading. It is optimized for e-ink but works great on any device. I really like how lightweight it is. Takes a while to get used to the controls, but it's worth in the end.

N
Jul 17, 2024
0

One of the most functional e-reader app that's open source. Lots of options and runs quick even on old devices.

Alabaster3632
Aug 20, 2022
0

Great for eink devices but if you use a normal android device use Librera, its much better.

What is KOReader?

KOReader is a document viewer for E Ink devices. Supported fileformats include EPUB, PDF, DjVu, XPS, CBT, CBZ, FB2, PDB, TXT, HTML, RTF, CHM, DOC, MOBI and ZIP files. It’s available for Kindle, Kobo, PocketBook, Android and desktop Linux.

Main features:

  • portable: runs on embedded devices (Cervantes, Kindle, Kobo, PocketBook, reMarkable), 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, …

KOReader information

  • Developed by

    KOReader Community
  • Licensing

    Open Source (AGPL-3.0) and Free product.
  • Written in

  • Rating

    Average rating of 4.9
  • Alternatives

    52 alternatives listed
  • Supported Languages

    • English

AlternativeTo Categories

News & BooksOffice & ProductivityEducation & Reference

GitHub repository

  •  22,394 Stars
  •  1,495 Forks
  •  1000 Open Issues
  •   Updated Jul 18, 2025 
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Our users have written 6 comments and reviews about KOReader, and it has gotten 61 likes

KOReader was added to AlternativeTo by cges30901 on Mar 26, 2019 and this page was last updated Jun 13, 2025.