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

  • Cover download: Allowing saving alternate covers to disk or in the book's data folder by right clicking on the cover. Closes tickets: 2020603
  • Content server: Allow disabling full text search via the web interface. Closes tickets: 2020237
  • When sending books to the device confirm the overwrite if the book already exists on the device. Closes tickets: 2020233
  • E-book viewer: Handle horizontal wheel events as section jumps in paged mode
  • Comic Input: When grayscaling comic images use 16bit gray instead of 8bit for better fidelity
  • When using the PNG format for images this results in larger files but with better grayscaling fidelity.
  • Add a new option in Preferences->Searching to disable keyboard searching in book list (i.e. you can turn off the behavior that pressing a key will jump to the first book whose title starts with that letter)
  • Manage categories dialog: Use alternating row colors and allow adjusting row height. Closes tickets: 2018423
  • Allow assigning a keyboard shortcut in Preferences->Shortcuts to open the data folder of a book
  • Various improvements to syntax highlighting for the Markdown long text editor

Bug fixes

  • Fix a regression in 6.16 that broke restoring of the database. Closes tickets: 2018025
  • Tag browser: Fix using F2 to edit items not allowing completion
  • Book details: Fix formatting of text when copying all book details in narrow mode
  • Book details: Fix copy all not respecting line breaks in fields
  • Fix a regression in previous release that broke scrolling when using the scroll_per_row tweak. Closes tickets: 2018660
  • Fix a regression in the previous release that broke the category manager dialog in some situations. Closes tickets: 2018548

New news sources

  • Irish Times Free by unkn0wn
  • elEconomista.es and El Confidencial by Hugo Meza

Improved news sources

  • NYTimes
  • Economist
  • Washington Post
  • Irish Independent and Irish Times
  • Live Mint
  • Psych
  • Hindu