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Complete e-book library management system.


Calibre is a complete e-book library manager. Organize your collection, convert your books to multiple formats, and sync with all of your devices. Let Calibre be your multi-tasking digital librarian.

Manage, convert, sync, and more

  • Library management. Calibre keeps things orderly by creating single entries for books that contains multiple formats. Add tags and comments for better searchability.
  • Format conversion. Calibre's robust conversion options support a wide variety of file formats.
  • File syncing. Calibre's device drivers seamlessly support all the top e-readers and devices.


Note: Now requires OS X 10.9.5 or later


  • Edit metadata dialog: Allow right clicking the Paste ISBN button to instead paste an identifier with a different prefix.
  • Tag browser: Add an option to control the spacing between items
  • Add an option in Preferences->Look & feel to show individual layout buttons in the status bar, as was the case in calibre 2.x
  • Edit metadata dialog: Add buttons to easily set/clear Yes/no columns
  • Support for RAR 5.0 format RAR and CBR files


  • Version 3.1.1 fixes a regression in 3.1.0 that prevented the standalone calibre-server.exe from working on Windows and macOS
  • Content server: Fix various bugs in the SSL implementation causing aborted transfers when enabling SSL in the server
  • Content server: Fix connections not being closed after errors/timeouts on the server side
  • Fix an error during startup on Windows systems where the home directory is in a character encoding different from the system encoding
  • Edit book: Fix escaping of text for regular expression searches unnecessarily escaping spaces
  • Get Books: Search the entire catalog, including restricted books
  • Fix regression in previous release that caused the Tag browser view to jump around when renaming items
  • Splash screen: Fix text vertical overlap for some systems/font sizes
  • Server: --daemonize option should not be present on Windows and macOS as it does not work on those platforms
  • macOS: Fix some keyboard shortcuts not working in calibre 3.0
  • Server interface: Fix error in the Browse all downloaded page when the book list mode is set to detailed list
  • Get books: Update and plugins for website changes
  • Content server: Fix for home screen being empty if the path to the calibre library has a trailing slash.
  • Content server: Fix the new server interface not working with the --url-prefix option when the trailing slash is omitted on the URL used in the browser.
  • Google images metadata download plugin: Fix for change in website causing no covers to be downloaded

Improved News Sources

  • The Times
  • Wall Street Journal
  • New Yorker
  • BBC News

calibreMore Information

File Size
77.9 MB
Operating Systems
Mac OS X
System Requirements
  • OS X 10.9.5 or later

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