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crqt-ng

Cross platform open source e-book reader.

  • Completely free
  • Linux
  • Open source

Overview

crqt-ng is an e-book reader, available on Linux.

Features described in its Flathub listing: Markdown support.

File formats mentioned: XML, EPUB, MOBI, FB2, DOCX, ODT, RTF and HTML.

Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.

Excerpts that establish this information
  • “Cross platform open source e-book reader” — Flathub, 10 November 2026
  • “Supported formats: fb2, fb3 (incomplete), epub (non-DRM), doc, docx, odt, rtf, pdb, mobi (non-DRM), txt, html, Markdown, chm, tcr.” — Flathub, 10 November 2026
  • “Multi-tabbed interface” — Flathub, 10 November 2026

At a glance

All of crqt-ng is free: no feature is locked behind a paid plan, and its code is open.

Its licence (GPL-2.0+) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Strengths

  • Open source code
  • Commercial use allowed

About

crqt-ng is fast and small cross-platform XML/CSS based eBook reader. Written using the Qt framework. Supported formats: fb2, fb3 (incomplete), epub (non-DRM), doc, docx, odt, rtf, pdb, mobi (non-DRM), txt, html, Markdown, chm, tcr. Main functions: Ability to display 2 pages at the same time Displaying and Navigating Book Contents Text search Word hyphenation using hyphenation dictionaries Most complete support for FB2 - styles, tables, footnotes at the bottom of the page Extensive font rendering capabilities: use of ligatures, kerning, hinting option selection, floating punctuation, simultaneous use of several fonts, including fallback fonts Detection of the main font incompatible with the language of the book Reading books directly from a ZIP archive TXT auto reformat, automatic encoding recognition Flexible styling with CSS files Background pictures, textures, or solid background HiDPI support Multi-tabbed interface

Description from Flathub — AppStream (Flathub)

Sources and checks

  • Facts collected from Flathub (credit card, source code, publisher, licence, free status, platforms, commercial use, version) —
  • Last technical check: 7 November 2026
  • Description from Flathub — AppStream (Flathub)

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