Version6(as of 9/2/2022)
PlatformsWindows, Mac, Linux
LicenseOpen Source
Go to Website
Rating:3.7  |  159 Votes

Main Features

  • Supports an extensive list of eBook formats for reading, creating, and converting
  • Offers a convenient way to download eBooks from Internet stores
  • Downloads news stories and converts them into eBook form
  • Provides helpful library management tools

Software Overview

Screenshot of Calibre 6
Screenshot of Calibre 6

Calibre is a free, open-source eBook application that allows you to manage your collection of eBooks on your computer. In the application, you can organize, read, create, and edit your eBooks in various formats.

Calibre supports a wide array of popular eBook file formats. It can read eBook formats such as EPUB, LRF, HTML, LIT, MOBI, PDF, Topaz, Text, and SNB. It also allows you to create and convert eBook formats, including EPUB, MOBI, AZW3, KFX, FB2, HTMLZ, LIT, LRF, PDB, PDF, TXT, and ZIP. In addition to supporting eBook formats, Calibre can also read popular word processing files, such as DOCX, DOC, and ODT.

Calibre offers helpful management tools to organize your eBook library. For example, you can sort and search your books by title, author, date published, rating, etc., which allows you to search through your collection more quickly. In addition, the application provides editing tools to help you customize the appearance of your eBooks, such as the font, style, and images.

Calibre also provides a convenient avenue to download content. For example, you can download eBooks and news in eBook format from websites such as The New York Times, Time, Newsweek, and ESPN.


Calibre is a good eBook managing application. It supports a wide array of eBook formats with viewing and editing capabilities, provides helpful library management tools, and makes it easy to download new content. f you own any eBooks or are looking to start, give Calibre a shot.

Primary File Type

epub icon.EPUBOpen eBook

Supported File Types

ExtensionFile Type
.EPUBOpen eBook
.AZW3Amazon KF8 eBook File
.AZW4Amazon Print Replica eBook
.BOOKiBooks Author Document
.CBCComic Book Collection
.CBRComic Book RAR Archive
.CBZComic Book Zip Archive
.CHMCompiled HTML Help File
.DJVDjVu Image
.DJVUDjVu Image
.DOCMicrosoft Word Document (Legacy)
.DOCXMicrosoft Word Document
.FB2FictionBook 2.0 File
.HTMHypertext Markup Language File
.HTMLHypertext Markup Language File
.HTMLZZipped HTML eBook
.IBAiBooks Author Document
.KFXAmazon KF10 eBook File
.LITeBook File
.LRFSony Portable Reader File
.LRSLibrie Reader Source File
.LRXSony Portable Reader File
.MARKDOWNMarkdown Documentation File
.MOBIMobipocket eBook
.NCXEPUB Navigation Control XML File
.ODTOpenDocument Text Document
.OPFOpen Packaging Format File
.PDBPalm Desktop Database File
.PDFPortable Document Format File
.PDRProntoDoc for Word Recovered Document
.PMLPalm Markup Language File
.POBIKindle Touch Periodical File
.PRCMobipocket eBook File
.RARWinRAR Compressed Archive
.RTFRich Text Format File
.SNBShanda Bambook eBook
.TCRPsion Series 3 eBook File
.TEXTPlain Text File
.TPZKindle Topaz eBook File
.TXTPlain Text File
.XHTMLExtensible Hypertext Markup Language File
.XPSXML Paper Specification File
.ZIPZipped File

Additional Related File Types

ExtensionFile Type
.AZWAmazon Kindle eBook File
.AZW1Amazon Topaz eBook
.AZW2Kindle Active Content App File
.AZW3Amazon KF8 eBook File
.CALIBRECalibre Device Data File
.PMLZZipped Palm Markup Language File
Updated 9/2/2022