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

  • Trim image: Allow specifying the size of the trim rectangle using numbers. Closes tickets: 2056116
  • Full text search: Allow pressing Ctrl+S to select the current book in the calibre book list. Closes tickets: 2056664
  • Speed up scrolling through the book list book-by-book by only redrawing the book details panel when scrolling pauses
  • Add a tweak under Preferences->Tweaks to set the first day of the week in popup calendars used to input dates

Bug fixes

  • CHM Input: Handle CHM files with no HHC Table of Contents. Closes tickets: 2056470
  • E-book viewer: Fix a few settings such as pages per screen and header/footers not being saved in profiles
  • Full text search: Ignore text inside <ruby> tags when indexing books. Closes tickets: 2056614
  • DOCX Output: Preserve spaces around soft hyphens
  • Book details popup: Copy the original cover image to the clipboard even when the image is rescaled to fit into view
  • Fix changing disabled colors in the UI color palette overriding non-disabled colors
  • Content server: Fix deletion of viewer profiles not working

Improved news sources

  • LiveMint
  • Bloomberg
  • Natural Geographic
  • MIT Technology Review
  • NY Review of Books
  • Scientific American