Calibre is an e-book library manager. It can view, convert and catalog e-books in most of the major e-book formats. It can also talk to many e-book reader devices. It can go out to the Internet and fetch metadata for your 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

Is Calibre an e-book reader?

No, Calibre is an e-book manager in which you can organize existing e-books into virtual libraries, displaying, editing, creating and converting e-books, as well as syncing e-books with a variety of e-readers.

Can I write an e-book with Calibre?

Yes. Calibre can turn your personal documents to e-books or create them from scratch. It has automatic style helpers and scripts generating the book's structure.

Which devices does Calibre support?

Calibre is compatible with almost any e-reader, phone or tablet, as well as Windows, Mac and Linux devices. You can transfer your e-books from one device to another in seconds. Calibre will send the best file format for your device, converting it if needed, automatically.

What formats does Calibre support conversion to/from?

Calibre supports the conversion of many input formats to many output formats such as:

  • Input Formats: AZW, AZW3, AZW4, CBZ, CBR, CB7, CBC, CHM, DJVU, DOCX, EPUB, FB2, FBZ, HTML, HTMLZ, LIT, LRF, MOBI, ODT, PDF, PRC, PDB, PML, RB, RTF, SNB, TCR, TXT, TXTZ
  • Output Formats: AZW3, EPUB, DOCX, FB2, HTMLZ, OEB, LIT, LRF, MOBI, PDB, PMLZ, RB, PDF, RTF, SNB, TCR, TXT, TXTZ, ZIP.

Can Calibre read RSS feeds?

Yes, Calibre can deliver news to your device from hundreds of news sources or any RSS feed.

Does Calibre offer cloud storage for my library?

Calibre doesn't offer cloud storage, but it does integrate with most major cloud providers, including Google Drive, Dropbox, and OneDrive. This way, you can set up your eBook library in the cloud and access the content from your phone or tablet.

What's New

New features

  • E-book viewer: Add a command line flag --new-instance to force the viewer to open a new window even if the option to always use a single viewer window is set. Closes tickets: 2038760
  • E-book viewer: Image popup: Add a checkbox to remember the last used zoom level. Closes tickets: 2038862

Bug fixes

  • Annotations browser: Fix exporting highlights in markdown not including all chapter titles for books with only a single highlight per chapter or a multi level ToC. Closes tickets: 2039336
  • E-book viewer: Fix a regression that could cause the viewer to enter an infinite loop when displaying the result of a search that has only one match that is not found. Closes tickets: 2038747
  • E-book viewer: Fix the occasional search result being marked as not found even though it is found. Closes tickets: 2038747
  • TXTZ Output plugin: Only keep images if the text format is one that can reference images. Closes tickets: 2039474
  • TXTZ Output: Fix cover not being properly identified in the generated TXTZ metadata. Closes tickets: 2038848
  • FB2 Input: Fix the "Annotations" section not showing up in the Table of Contents. Closes tickets: 2038575
  • Linux: Content server: Do not call listen on pre-activated sockets. Closes tickets: 2039395
  • Fix sort order of similarly-named hierarchical categories
  • Fix a regression that broke reading of covers from HTMLZ and TXTZ files. Closes tickets: 2038778

New news sources

  • Project Syndicate, Scroll.in and Newslaundry by unkn0wn

Improved news sources

  • Wall Street Journal
  • Scientific American
  • 1843
  • Financial Times
  • Spectator Magazine
  • El Diplo
  • Washington Post
  • national Geographic