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 Home » Freeware Downloads » Office, Home Office and Writing » eBook Readers and Tools » Calibre for Windows v4.3.0   
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Calibre for Windows v4.3.0

Calibre is a free and open source e-book library management application developed by users of e-books for users of e-books. It has a cornucopia of features divided into the following main categories:

Library Management
E-book conversion
Syncing to e-book reader devices
Downloading news from the web and converting it into e-book form
Comprehensive e-book viewer
Content server for online access to your book collection
E-book editor for the major e-book formats

Calibre started life on 31 October, 2006, soon after the release of the SONY PRS-500, the first e-ink based reader to be sold commercially in the US. At the time, I was a graduate student, with a lot of time on my hands. The PRS-500 did not work at all with Linux, my operating system of choice, so I decided to reverse engineer the USB protocol that it used, to get it working on Linux. This was accomplished with the help of the fine folks over at and calibre was born, albeit named libprs500.

At the time there were no satisfactory tools to convert content into the LRF format, used by the SONY reader, so I decided to implement a converter to convert the most popular e-book formats to LRF. This converter proved to be wildly popular and far better than the (mostly non-existent) offerings from SONY. It was picked up and used by various publishing houses and content digitizers to produce the first generation of books in the LRF format.

As my e-book collection grew, I realized that managing it was quickly becoming unwieldy, so I decided to write a graphical interface to libprs500 to make it easier. This became calibre, in its present form, as a comprehensive e-book management tool. libprs500 was renamed to calibre in mid-2008. The name calibre was chosen by my wife, Krittika. The libre in calibre stands for freedom, indicating that calibre is a free and open source product, modifiable by all. Nonetheless, calibre should be pronounced as cali-ber, not ca-libre.

Today calibre is a vibrant open-source community with half a dozen developers and many, many testers and bug reporters. It is used in over 200 countries and has been translated into a dozen different languages by volunteers. calibre has become a comprehensive tool for the management of digital texts, allowing you to do whatever you could possibly imagine with your e-book library. Reading is very important to me and one of my goals has always been to prevent either the fragmentation or the monopolization of the e-book market by entities that care solely for short-term goals. As the calibre community continues to grow, driven by book lovers, for book lovers, hopefully it will always present an alternative for people that love to read e-books and want to be in control of their own digital libraries.

Release: 4.3 [08 Nov, 2019]
New features

Viewer: Halve the time taken to prepare large EPUB files for first open
Viewer: Add an optional toolbar with common actions turn it on under Preferences->Miscellaneous
Viewer: Change the default color scheme to "System" which matches the colors used by the rest of calibre/the operating system. Also means the colors change automatically when the system color theme changes.
Viewer: Add a keyboard shortcut ; to go to a book location or position
Viewer: Add a control to easily reset the interface to defaults
Viewer: Allow also using --open-at with book positions
Viewer: Add command line option to force reloading of books

Bug fixes

Content server: Fix conversion of comics not working.

Closes tickets: 1847017
Book details: Allow right click to copy author links and identifiers
Book details: Fix removal of identifiers via right click not working
Book details: Fix clicking on tags etc not generating exact match searches
Viewer: When resizing and the resizing back to the old size ensure we return to the same page in paged mode.

Closes tickets: 1847507
Duplicates dialog: Sort sub-list of matching books already in calibre by author for easier inspection.

Closes tickets: 1851386
PDF Output: Fix links that go to destinations in the same file not working.

Closes tickets: 1849529
Viewer: Fix changes to keyboard shortcuts not being applied until viewer is restarted.

Closes tickets: 1851045
DOCX Input: Fix AlternateContent blocks rendering both choice and fallback sections.

Closes tickets: 1847365
macOS: Fix unable to re-arrange entries in the CSV catalog list.

Closes tickets: 1850918
Windows: fix UTF-16/truncated output when reporting unhandled exceptions
Viewer: Fix mouse wheel not working when mouse is over page margins.

Closes tickets: 1850845
Linux: Install bash completions as individual files for each calibre binary
Content server: Fix download button not working with non-ebook formats.

Closes tickets: 1850078
Fix a crash in popup completion lists if the mouse is over the list and list is scrolled with the keyboard
Viewer: Fix rare exception when navigating to a CFI.

Closes tickets: 1849775
Viewer: Ignore failures printing console message when the viewer is launched with broken stderr.

Closes tickets: 1849612
Amazon metadata: Fix failure to get published date from audible book pages.

Closes tickets: 1849400
Viewer: Fix shortcuts preferences not being translated
Tag browser: Fix incorrect text color when using dark theme for hovered item
Fix crash if canceling the icon theme download while covers are downloading
Viewer: Fix non-ASCII content in stylesheets not being interpreted correctly.

Closes tickets: 1848858
Viewer/Content server: Fix history for completion popups such as search bars not being stored correctly.

Closes tickets: 1847976
PDF Output: When a link with a fragment points to a non-existent anchor link to the top of the file instead of not linking at all
PDF Output: Fix standard svg fullscreen image markup not working
PDF Output: Fix some books with full screen images failing to convert.

Closes tickets: 1848701

Improved news sources

Various Polish news sources

Click here to visit the author's website.
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Downloads Views Developer Last Update Version Size Type Rank
5,195 10,402 Kovid Goyal <img src=""border="0"> Nov 08, 2019 - 11:30 4.3.0 92.57MB EXE 5/5, out of 18 Votes.
File Tags
Calibre  for  Windows  v4.3.0  

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