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KindleGen is a command line tool which enables publishers to work in an automated environment with a variety of source content including HTML, XHTML or EPUB. KindleGen converts this source content to a single file which supports both KF8 and Mobi formats enabling publishers to create great-looking books that work on all Kindle devices and apps. This utility is able to handle a variety of formats for input documents, including HTML, EPUB and OPF. It can even handle directories and ZIP archives as source, but only for ever-eXtending Mobile Document Format e-books or XMDF, in short, and FictionBook files (FB2). A nice feature of this app is the ability to have all the pictures in the book converted to GIF images, which will save some space and help keep the overall size of the e-book as low as possible. Also, if you want the messages to be displayed in other languages, the localization function of this tool makes this possible.

KindleGen is officially supported by Amazon to convert files to the Kindle format. We recommend you use KindleGen to create content that is compatible with all Kindle devices and apps. Files created with third-party software may not work properly on current or future Kindle devices and apps.

Highlights of KindleGen functionality
* Support for all KF8 functionality
* Generates a single file supporting both KF8 and Mobi format
* Support for multiple source formats including HTML, XHTML and EPUB

KindleGen is no longer available for download. Please use Kindle Previewer to convert, preview, and validate your eBooks. Kindle Previewer provides the same functionality of KindleGen and, in addition, provides:

Latest Kindle Conversion software that provides up-to-date validation for Enhanced Typesetting books (currently available for books in all languages except Simplified Chinese, Japanese, and Russian).
Choice of using in Graphical User Interface (GUI) for a visual inspection of your book, or, Command Line Interface (CLI) mode for bulk validation.
Faster preview and validation with features like thumbnails, auto-previews, and filters for pages with images, tables, drop caps, and links.