Kindle File Format

Kindle File Format

Filename extension	.azw, .azw3, .kfx
Internet media type	application/vnd.amazon.mobi8-ebook
Developed by	Amazon.com
Initial release	2007
Latest release	10 11 August 2015
Type of format	e-book file format
Extended from	HTML5, CSS3, MOBI
Open format?	No

Kindle File Format is a proprietary e-book file format created by Amazon.com that can be downloaded and read on devices like smartphones, tablets, computers, or e-readers that have Amazon's Kindle app. E-book files in the Kindle File Format originally had the filename extension .azw;^[a] version 8 (KF8) introduced HTML5 & CSS3 features and had the .azw3 extension; and version 10 introduced a new typesetting and layout engine featuring hyphens, kerning and ligatures and has the .kfx extension.
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