KOReader on E‑Ink: Reflowed PDFs, Faster Navigation, Lua Plugins

The first time PDFs didn’t fight back

A lot of reading starts the same way: you buy an e‑reader, you love how it feels in daylight, and then you try a PDF. That’s where the fight begins. One document is scanned at an angle. Another is two columns wide, so you’re constantly zooming and panning. A third one has footnotes that are “there,” but never at the moment you want them.

That’s the moment KOReader tends to show up in people’s lives. KOReader is an open-source eBook reader optimized for e‑ink devices, but it doesn’t treat PDFs as “second-class citizens.” Instead, it gives you reflow tools, multiple navigation views, and a deep customization system powered by Lua plugins. It runs on devices like Kindle and Kobo, as well as Android, Linux, and some other platforms—so the same reading brain can follow you around.