The Keep Screen On plugin prevents the device's screen from turning off while reading in KoReader. This plugin is useful for long reading sessions.
If you are serious about reading on an E Ink device—whether a Kobo, PocketBook, or Android e-reader—you have likely heard of KOReader. It is the open-source juggernaut that transforms limited stock firmware into a PDF-crunching, format-agnostic powerhouse.
But the real secret weapon? Plugins.
KOReader is modular. You can keep it lean or turn it into a research assistant, a language tutor, or a writing machine. Here are the best plugins that genuinely change how you read.
Note: Some plugins are pre-packaged in “KOReader nightlies” (builds from the last 7 days). Check your version: Tools → Settings → Version. best koreader plugins
Best for: Users with multiple e-readers (e.g., a Kobo for home, an Android phone for commuting).
The native progress sync is good, but the Koreader Sync plugin (often referred to as koreader-sync-server) is transformative. It uses a self-hosted or public sync server (like sync.koreader.rocks) to synchronize:
Unlike proprietary clouds, this respects your privacy. You can even point it to a NextCloud or WebDAV server. To use it, enable the plugin, log in via your device’s browser, and your entire library becomes a seamless continuum.
Sometimes, Elias encountered a term he didn't know—perhaps an obscure French term for a shade of blue. In the old days, he would have to put the book down, unlock his phone, and search. The Keep Screen On plugin prevents the device's
With KOReader's integrated Wikipedia and Translate plugins, he simply long-pressed the word.
Why you need it: Calibre is the gold standard for ebook management, but the default “send to device” is clunky. Metadata (series info, tags, covers) often gets lost.
What it does: This plugin turns KOReader into a Calibre client. Over WiFi, you can:
Pro tip: Use this with Calibre’s “Virtual Libraries” feature to create a custom "To Read" shelf that mirrors directly to your ereader. Note : Some plugins are pre-packaged in “KOReader
Why you need it: Physical page-turn buttons are great, but what if you want to use a Bluetooth remote? (e.g., the 8BitDo Zero 2)
What it does: This plugin maps external Bluetooth keyboard or gamepad inputs to KOReader actions. You can assign:
Pro setup: Pair the plugin with a gooseneck tablet holder and a presentation clicker. You can now read in bed with your hands under the blankets.