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KOReader

Original article
koreader.rocks|526 points|168 comments|by Cider9986|Jul 29, 2026

KOReader

KOReader is a sophisticated document viewing application specifically engineered for devices utilizing E Ink technology. It serves as a powerful alternative to standard factory software, providing enhanced flexibility for readers.

KOReader transforms the reading experience by supporting a vast array of digital formats across multiple hardware ecosystems.

🛠 Supported Ecosystems

The software is compatible with the following platforms:

  • Kindle
  • Kobo
  • PocketBook
  • Android
  • Desktop Linux

📚 File Format Compatibility

The versatility of KOReader is evident in its wide range of supported extensions. If we define the set of supported formats as FFF, the cardinality is ∣F∣=15|F| = 15∣F∣=15.

CategorySupported Formats
E-BooksEPUB, FB2, MOBI, PDB
DocumentsPDF, DjVu, XPS, DOC, RTF, TXT, HTML, CHM
Comics & ArchivesCBT, CBZ, ZIP

🗺 System Architecture

🖼 Feature Previews

Below are some of the interface highlights:

Menu System

Footnote Management

Integrated Dictionary

🔗 Resources & Contribution

For those looking to install, learn, or contribute, the following resources are available:

  • Consult the User Guide
  • Access the Download page
  • Browse the Wiki
  • Engage in the Forum
  • Submit a Bug Report
  • Explore Develop & Developer Docs
  • View the Logo & Gallery

For developers, the project can be managed via command line:

git clone https://github.com/koreader/koreader.git
cd koreader
# Follow developer docs for build instructions