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Software · Office & notes

calibre

The one stop solution to all your e-book needs.

  • Completely free
  • Windows, macOS and Linux
  • Open source
  • No account

Overview

calibre is an e-book reader, available on Windows, macOS and Linux.

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
  • “calibre is an e-book manager.” — GitHub, 10 November 2026

At a glance

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

Its licence (GPL-3.0) 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
  • No account needed
  • Commercial use allowed

About

calibre is the one stop solution to all your e-book needs. You can use calibre to catalog your books, fetch metadata for them automatically, convert them from and to all the various e-book formats, send them to your e-book reader devices, read the books on your computer, edit the books in a dedicated e-book editor and even make them available over the network with the built-in Content server. You can also download news and periodicals in e-book format from over a thousand different news and magazine websites.

Description from Flathub — AppStream (Flathub)

Sources and checks

  • Facts collected from Winget (Windows Package Manager) (credit card, account, publisher, licence, free status, platforms, commercial use, version) —
  • Facts collected from Official plan pages (pricing, licence, terms) (commercial use) —
  • Facts collected from Comptoir du Libre (source code) —
  • Facts collected from Flathub (credit card, publisher, licence, free status, platforms, commercial use, version) —
  • Facts collected from Homebrew (platforms) —
  • Facts collected from Wikidata (licence, platforms) —
  • Last technical check: 6 November 2026
  • Description from Flathub — AppStream (Flathub)

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