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 Home » Freeware Downloads » Office, Home Office and Writing » eBook Readers and Tools » Calibre v5.5.0   
File - Download Calibre v5.5.0

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Calibre v5.5.0

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.

This download is for the Windows 8/8.1/10 version.
If you need the Windows Vista/7 version, download here.
If you need the MacOS version, download here.
If you need the Linux version, download here.

Release: 5.5 [13 Nov, 2020]
New features

Support the calibre:// URL scheme

Clicking on calibre:// URLs can be used to have calibre perform various actions.For details, see:
Viewer: Show calibre:// URL for current book in the Goto->Location panel
Edit book: Add an action to the right click menu for tabs to close tabs to the right of the current tab.

Closes tickets: 1902518
Add ability to copy tag, publisher and author in Book details panel by right-clicking

Closes tickets: 1902413
Annotations browser: Add a context menu for common actions.

Closes tickets: 1902326
Annotations browser: Show a dot for highlights with notes.

Closes tickets: 1899839
Edit book: Saved searches panel: Allow copying the current saved search to the regular search panel by clicking the Export button.

Closes tickets: 1902227
Windows: Fix command line arguments not working for the portable.exe launchers
Viewer: back and forward buttons on the mouse now trigger the back and forward actions
Option to mark all books with annotations/bookmarks

Closes tickets: 1902313
Various minor improvements to how keyboard focus is handled in the Tag browser

Bug fixes

Edit book: Fix regression in calibre 5 that caused an error when managing user dictionaries.

Closes tickets: 1903294
Viewer: Fix previous/next buttons iterating over removed bookmarks

Closes tickets: 1903831
Welcome wizard: Fix changing the language causing a empty folder to be created.

Closes tickets: 1903825
Viewer: Fix regression causing custom shortcuts with shift key pressed not working

Closes tickets: 1903699
Viewer: In dark mode when showing images with transparency in the popup use a light background color as most images are designed with a light background color in mind.

Closes tickets: 1903423
Fix a regression in the previous release that broke conversion of DJVU files

Closes tickets: 1903428
Metadata edit: "Set to Undefined" button missing on integer columns.

Closes tickets: 1903363
Entry remains underlined in Tag Browser after clearing filter

Closes tickets: 1903086
XML Catalogs: Fix languages field missing

Closes tickets: 1902126
Fix a regression that broke loading of third party plugins that are encoded in an encoding other than UTF-8
macOS: Fix viewer not responding to cmd+c to copy text by default
Windows: Fix sending email on computers with non-ASCII computer names

Improved news sources

Spectator Magazine

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Downloads Views Developer Last Update Version Size Type Rank
6,373 13,042 Kovid Goyal <img src=""border="0"> Nov 13, 2020 - 12:36 5.5.0 98.27MB EXE 5/5, out of 28 Votes.
File Tags
v5.5.0  Calibre  
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