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List of common e-book file extensions

Some of the most common digital publications originally introduced along dedicated readers like Kindle. Nowadays can be read on a broad range of devices, including smartphones and tablets.

Common e-book files may change in time as the popularity and significance of some formats can change.
Whole category of e-book files contains now 118 file types. Show all e-book file types.


Files with azw extension can be found as one of the most common ebook format for Amazon Kindle. These files are typically protected by Digital Right Management.


Files with azw3 extension may be found as ebook used in the latest Amazon Kindle digital reader. A format exclusive to Kindle, similar to EPUB.


Files with azw4 extension are e-books for Amazon Kindle reader. It is one of the default formats used by Amazon. AZW4 is a variation of PDF format.

cbr file icon cbr 

A cbr file extension is used for a popular comic ebook format. CBR is basically a rar file that contains several images (usually JPGs) that can opened in comic books viewer as a sequence of screens.

cbz file icon cbz 

A cbz file extension is used for popular comics e-book format based on ZIP compression. It's basically a renamed zip that contains several or more images that can be viewed in comic readers in a slideshow mode.


File extension epub is used by e-book in Open Publication structure eBook format. Since 2007 EPUB format is regarded as international standard. Generally used for text-centric books or other publications.


Files with fb2 suffix can be usually found as ebooks, in XML based FictionBook format popular in Russia.


Files with iba extension can commonly be found as ebooks projects created using the iBooks Author platform.


Files with ibooks sufix are commonly found as e-books from Apple IBooks app.


Files with lit extension can be mainly found as older ebooks in Microsoft Reader eBook format.


Files with mobi suffix can be typically found as ebooks saved in Mobipocket format, now mostly used by Amazon.

pdf file icon pdf 

A pdf file extension is mainly used for Adobe Portable document format, commonly referred to as PDF. All programs that create some sort of documents or projects offer the possibility to export their format to PDF format. A free PDF viewer (Adobe Reader) is available for download from Adobe website.

This is a list of some the most common file types from this category and may change in time as the popularity and significance of some formats can change. Whole category of e-book files contains now 118 file types. Show all e-book files.

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