Calibre (64-bit) specifications

What's new in version 2.3

New Features

  • Cover Grid: Dynamically adjust the size of the in memory cover thumbnail cache based on the window size to ensure flicker free rendering even on very large screens.
  • Template tester: Remember last used template
  • Get Books: When downloading books show a popup message telling the user that the books will be added to the calibre library automatically, to help new users understand what is happening. The popup message can be disabled.
  • E-book viewer: Try to detect when a chapter has a page break before the start of the chapter's text resulting in a leading blank page and override the page break.

Bug Fixes

  • Edit metadata dialog: Fix the author sort field not being marked red initially when the author sort does not match the author due to a Qt 5 behavior change.
  • OS X: Fix restarting of calibre not working if is placed in a location with spaces in the path
  • Fix regression that caused calibre running in debug mode on OS X to not have a menubar or dock icon
  • Get Books: Fix downloading ebooks from Project Gutenberg via the builtin browser not working because of changes to the Project Gutenberg website.
  • Get Books: Update Gutenberg plugin for changes to the Project Gutenberg website.

Improved news sources

  • Strategy+Business
  • Dawn
  • American Thinker
  • Anchorage Daily News
  • Financial Times


  • Publisher Kovid Goyal
  • Publisher web site
  • Release date September 11, 2014
  • Date added September 11, 2014
  • Version 2.3


System requirements

  • Operating systems Windows 8 64-bit, Windows 7 64-bit, Windows 7, Windows Vista 64-bit, Windows 8, Windows Vista
  • Additional requirements Not available

Download information

  • File size 64.41MB
  • File name calibre-64bit-2.3.0.msi


  • Total Downloads 28,865
  • Downloads last week 411


  • License model Free
  • Limitations Not available
  • Price Not available