• Review
  • Changelog

 Why is Calibre Useful?

This open source software is a necessary tool for all, publishers, authors ,book lovers and many other people because it supports various ebook formats. Apart from support for various formats, tt also converts ebooks easily from one format to another. It converts very quickly depending on the length of the book. You can have an ebook converted in as little as 5 seconds. This is such a useful function especially for people who like reading in just one particular ebook reader. For example, books are cheaper in ePub and you love reading in MOBI, you can still go ahead and purchase this ePub version, get on your device where Calibre runs and simply convert the book to any format of your choice which in this case would be the MOBI format.

 You can also edit the name and cover art, which is a nice feature for people that download books from torrent sites and very creative people. A lot of times the books downloaded from torrent sites have long titles because it might contain the uploaders name or date uploaded and so forth, calibre helps you edit to cumbersome information into what the title of the book really is or what you want it called on any of your devices. It’s also common for torrent sites not to have a books cover art, you can actually change all that with Calibre using the 'edit cover' are feature. There is a feature that will help you search and download the actual cover art from sites, such as Amazon, Google, and so on. You can even delete books from any of your other devices straight from Calibre. 

You can further download the metadata of a book. For example, if the book you are editing does not have a title, name, rating, and so on, Calibre will help you to search for all this information on sites like Google, Amazon, and the likes, download this information, and save it for later. You can also easily change important details on an ebook with Calibre. The convenience this software offers in terms of syncing your ebooks with any of your devices is next to none.

With the 'heuristic processing' feature, Calibre can scan and search through your books for repeated patterns and fix it. Of course, this feature is off by default because calibre can make this worse but you can manually turn it on and also set this function up manually. It also provides key details like the author, the title, the size, ISBN number, the date, ratings, tags, the book series, the publisher, and when the book was published. You can also sort and group your ebooks with any of these features. 

Calibre can also optimize your book for specific e- readers such as nook, kindle reader , Microsoft reader, pocketbook pro 900, kobo voyage, Kobo reader,iPad,  Sony Reader, Samsung Galaxy, and many more. Supported formats for conversion are EPUB, MOBI, AZW3, DOCX, FB2, HTMLZ, LIT, LRF, PDB, PMLZ, RB, RTF, SNB, TCR, TXT, TXTZ, and ZIP.

It has a multiple language feature allowing you to publish your book in English, Spanish, French, German, and Italian. This 60.71MB( 63,655,936 bytes) has an open source license. It was authored by Kovid Goyal. It’s compatible with Windows, MacOS, and Linux.

Key Features of Calibre

  • Convert from one format to the next; 
  • Sync with all your devices; 
  • Edit cover art;
  • Edit details on an ebook; 
  • Create an ebook; 
  • Digital library; 
  • Heuristic processing; 
  • Structure detection; 
  • Search and replace; 
  • Tags feature; 
  • Debug feature; 
  • Optimizes for different devices;
  • Sorting and grouping feature. 


This is a necessary tool for publishers, authors, book lovers, book collectors because of its vast capabilities and efficiency.

What's new in 4.5 version?

New features:

  • Driver for the new PocketBook Inkpad X
  • Driver for the new Bookeen Diva HD
  • PDF Output: Add an option to shift text horizontally on odd/even pages.
  • Image viewing popup dialog: Add a checkbox to fit image to window.
  • Edit book: Create @font-face rules when importing multiple font files into book automatically, similar to how it is done when importing a single font file.

Bug fixes:

  • PDF Output: Fix incorrect rendering if the input document has too many anchors.
  • Fix a regression that could cause window layout settings to sometimes not be saved during shutdown

Improved news sources:

  • L'express
  • The Toronto Star


More info

  • Last Updated: 2019-11-30
  • Developer: Kovid Goyal
  • Homepage: calibre-ebook.com
  • Version: 4.5
  • File size: 102.52 MB
  • Downloads: 6,061
  • Operating system: Windows 10, Windows 8/8.1, Windows 7, Windows Vista, Windows XP
  • Filename: calibre-4.5.0.msi
  • MD5 Checksum: 284d3b41724aae305d730ed40fc39fe3