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

  • Allow creating rules to transform series names in the Bulk metadata editor and Preferences->Metadata download
    • Closes tickets: 2091268
  • Conversion: Automatically set the page progression direction for books that do not have it set and have their primary language either Arabic or Hebrew
  • Content server: Book details view: Make calibre://show-book and calibre://view-book URLs in the comments work
  • Edit book: Spell check: Add a button to export the currently displayed list of words as a CSV file
    • Closes tickets: 2092496
  • Add from ISBN: Add a checkbox to automatically convert obsolete ISBN 10 to ISBN 13
    • Closes tickets: 2092483
  • Save single format to disk: Allow choosing the book cover as the format to save
    • Closes tickets: 2092395
  • Option to show a button to access all available actions from the status bar in Preferences->Look & feel->Main interface

Bug fixes

  • Read aloud: Fix no audio produced when text contains <3 and using the Windows legacy speech engine
    • Closes tickets: 2092948
  • Fix Tabbing while editing cells in the book list not always working
    • Closes tickets: 2092643
  • Windows build: Also sign the portable launcher exes
  • Fix viewing books via the Cover browser not working when in device view
    • Closes tickets: 2092630

Improved news sources

  • LWN Weekly
  • Outlook India
  • Livemint