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Readest

Documentation

Readest is a modern, open-source ebook reader for Windows, macOS, Linux, iOS, Android, and the web.

What you can do with Readest

  • Read EPUB, PDF, MOBI, AZW3, FB2, CBZ, and TXT with tunable typography and themes.
  • Open two books side by side — great for translations or study.
  • Listen to any book via on-device, browser, or cloud TTS.
  • Translate passages and look up words in Wiktionary or Wikipedia.
  • Keep your library, progress, and highlights in sync across devices.
  • Connect to OPDS catalogs and your own Calibre library.
  • Export highlights to Readwise or Hardcover; sync reading progress and highlights with Koreader.

New here? Start with Getting Started for installation and your first book. Already reading? Jump to any topic below.

Getting Started

Install Readest on any platform and open your first book.

Reading

Everything about reading a book: gestures, navigation, and annotations.

Parallel Read

Read two books side by side — great for translations, study, and comparison.

Customization

Tune typography, themes, layout, and more to match how you read.

Listen (TTS)

Listen to any book using native, browser, or cloud TTS voices.

Translate & Lookup

Translate any passage or look up words without leaving the reader.

Library

Keep a big library tidy with groups, tags, filters, and OPDS.

Sync & Backup

Keep your books, progress, and notes in sync across devices.

Advanced

Reference: gestures, shortcuts, proofread rules, release verification.

Troubleshooting

Fixes for the most-reported issues, organized by symptom.

More resources