Calibre (software)

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Calibre (software)
File:Calibre logo.png
Original author(s) Kovid Goyal
Developer(s) Calibre Team
Stable release 0.6.34 / 2010-1-15; 128969308 ago
Written in Python, C
Platform GNU/Linux, Mac OS X, Windows
Type E-book management utiltiy (utility software)
License GNU General Public License

Calibre is a free and open source e-book management tool that allows one to organise, save and manage e-books, in and between a variety of formats[1]. It also supports e-book syncing with a variety of popular e-book readers. Calibre is cross-platform (programmed in Python and C) and is intended for the three main operating system structures, GNU/Linux, Mac OS X and Windows[1].


Development cycle

Calibre goes through a rapid development cycle, and chooses to incrementally fix bugs and increase the number of features available. Its current version is 0.6.36. Calibre uses both Trac and Launchpad for bug management[2].


File:Calibre main screenshot.png
Calibre's main interface.

Library Management

Calibre is primarily a e-book cataloging program. It is designed around the concept of the logical book, where a single database entry corresponds with the same book in a variety of formats.

Calibre supports sorting the books in its database by:

  • Title
  • Author
  • Date
  • Publisher
  • Rating
  • Size (Max size of all formats)
  • Series

It also supports extra metadata fields that can be searched on:

  • Comments: A general purpose field that can be used to describe the book.
  • Tags: A flexible system to categorise books.

Calibre also supports metadata retrieval via the Internet for a book based on its ISBN number or its title/author, instead of manually entering the metadata[1].

Format Conversion

Calibre supports the conversion of many input formats to many output formats. It can convert every input format in the following list, to every output format.


Output Formats: EPUB, FB2, OEB, LIT, LRF, MOBI, PDB, PML, RB, PDF, TXT[3].

(^PRC is a generic format, calibre supports PRC files with TextRead and MOBIBook headers)

Format conversion includes support for advanced typesetting features like tables, dropcaps, inline images, and embedded fonts.

File:Calibre sync iphone.png
Calibre supports e-book syncing with the Iphone (using Lexcycle Stanza.


Calibre currently supports the Sony PRS 300/500/505/600/700/900, Cybook Gen 3, BeBook (mini), Amazon Kindle (1 and 2), iPhone (with the stanza reader software), and Android phones (with the WordPlayer reader software). Version 0.6.27 added support for the Barnes and Noble nook. If a book has more than one format available, calibre automatically chooses the best format when uploading to the device[1].

News retrieval

Calibre can be configured to automatically fetch news from a number of websites/RSS feeds, format the news into a e-book and upload the e-book to a connected device. At the moment there is support for generating LRF/EPUB e-books. The e-books include the *full* versions of the articles, not just the summaries. Supported news sites include:

E-book viewer

Calibre comes packaged with an all encompassing e-book reader, which can read any of the aforementioned formats in the format conversion category.

Content server

Calibre also supports a inbuilt web server that allows users to access their e-book collection using an Internet browser and an Internet connection. The web server also allows the user to e-mail books and download news automatically[1].

See also

External links


  1. 1.0 1.1 1.2 1.3 1.4 Goyal, Kovid (2009). Calibre. Retrieved August 1, 2009, from Calibre web site:
  2. Goyal, Kovid (2009). Calibre. Retrieved August 1, 2009, from Calibre web site:
  3. Goyal, Kovid (2009). Calibre. Retrieved August 1, 2009, from Calibre web site:

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