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KOReader

An open-source reading app for e-ink readers, phones and computers that opens almost any file.

Instead of The Kindle reading app

M · ToolOpen sourceFreeNo accountWorks offline
koreader.rocks
Screenshot of the KOReader website

Screenshot from koreader.rocks, taken 2026-10-23, shown to help you recognise the tool. It belongs to its maker. Ask us to remove it.

KOReader is a document reader that volunteers around the world develop. It runs on Kindle, Kobo, PocketBook and reMarkable e-readers as well as Android and Linux, and it opens EPUB, PDF, DjVu, Mobi, comics and many other formats. It can also connect to a Calibre library, so your books stay in your own folder.

It gives you control of fonts, margins and layout that the store apps hide, and it needs no account. The settings are deep and take time to learn, and installing it on a Kindle means unlocking the device first, so read the project's notes before you try. It takes donations through Liberapay.

    What stands out

  • Opens EPUB, PDF, DjVu, Mobi, comics and more
  • Runs on Kindle, Kobo, PocketBook, reMarkable, Android and Linux
  • Gives you control of fonts and margins, with no account
Visit KOReader
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For comparison, we also reviewed Amazon Kindle (13/30) as a benchmark.

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