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 specifying web search links that are used when clicking on item names in the Book details panel for custom columns via Preferences->Add your own columns
  • Content server: When clicking on author names in the book details page perform the same action as clicking it in the calibre program's Book details panel

Bug fixes

  • Fix a regression in 7.17 that caused various minor problems with editing metadata directly in the book list
    • Closes tickets: 2097677
  • Fix a regression in the previous release that broke conversion using Heuristics and TXT input documents
  • E-book viewer: Fix header/footer text size too small when using multiple monitors and the primary monitors DPI is much less than secondary monitor DPI
    • Closes tickets: 2097563
  • Fix series mapping rules in the metadata preferences not working
    • Closes tickets: 2097947
  • Fix setting custom icon for category doesn't work
    • Closes tickets: 2098133
  • Kobo driver: Fix a regression that broke working with very old Kobo devices
    • Closes tickets: 2092732

Improved news sources

  • Science Journals
  • Barrons

Calibre 7.26.0 Release Notes:

New features

  • Allow setting custom icons for items in the Tab browser by right clicking on them and choosing "Manage icon for this value"
  • Kindle driver: Allow import of KFX files from 2024 Kindles that use the MTP protocol
  • A new tweak in Preferences->Tweaks to control the East Asian language used when transliterating to English
  • Add an option to adjust the size of the link and note icons in Book details under Preferences->Look & feel->Book details

Bug fixes

  • Nook driver: Fix the Glowlight 4 not working on Windows. Closes tickets: 2068527
  • MTP driver: Fix Internal storage and SD card being swapped on some devices that have buggy firmware that assigns the SD card a lower id than the internal storage
  • Template dialog: Respect the tweak for title/series when editing save to disk and send to device templates. Closes tickets: 2096841
  • Content server: Fix icons for individual formats not being shown in the Tag browser

New news sources

  • Alternatives Economiques by Kabonix
  • Zerodeux by Kabonix
  • Afrique XXI by Kabonix
  • Orient XXI by Kabonix
  • Contretemps by Kabonix
  • Faz.net by Anonymous
  • Moview Web and Football League World by SpicyPoison

Improved news sources

  • spektrum.de
  • Economist
  • Arret sur images
  • Le Canard Enchaine
  • Foreign Affairs