Kindle File Format

Source: Wikipedia, the free encyclopedia.
Kindle File Format
Filename extension
.azw, .azw3, .kfx
Internet media type
application/vnd.amazon.mobi8-ebook
Developed by
CSS3, MOBI
Open format?No

Kindle File Format is a

extension, and version 10 introduced a new typesetting and layout engine featuring hyphens, kerning, & ligatures
and have the .kfx extension.

History

Kindle devices and apps are designed to use Amazon's e-book formats: AZW that is based on

proprietary formats
. AZW files debuted with the first Amazon Kindle in 2007.

Software such as the

Portable Document Format (PDF) files; however, reflowing
is not supported for these file types.

In late 2011, the Kindle Fire introduced "Kindle Format 8" (KF8), also known as AZW3 file format.

CSS3 features,[5] while acting as a container for a backwards-compatible MOBI content document.[6][7]

In August 2015, all the Kindle e-readers released within the previous two years were updated with a new typesetting and layout engine that adds

ligatures to the text; e-books that support this engine require the use of the "Kindle Format 10" (KFX) file format.[8]
E-books that support the enhanced typesetting format are indicated in the e-book's description on its product page.

In 2017, Amazon released Kindle Create, a tool that can convert Microsoft Word files to Kindle file format.[9]

In 2022, while the Send-to-Kindle service only supported the original .mobi/.azw ebook formats (along with some other non-ebook file formats),[10] Amazon announced removing this support in favor of .epub which will be converted to Amazon's KF8 (.azw3) from late-2022.[11][12][10]

References

  1. ^ "AZW3 file - Zamzar - Free online file conversion". Archived from the original on 2019-04-18. Retrieved 2017-08-15.
  2. ^ "Kindle Publishing Programs". Amazon.com. July 12, 2011. Archived from the original on August 15, 2011. Retrieved August 15, 2011. Now via Internet Archive.
  3. ^ "KindleGen". Amazon.com. Archived from the original on September 5, 2019. Retrieved February 7, 2019.
  4. ^ Kindle Format 8 Archived 2017-03-29 at the Wayback Machine, Amazon.com, October 2011.
  5. ^ "List of supported HTML tags and CSS elements". Amazon. Archived from the original on 14 December 2019. Retrieved 4 August 2012.
  6. ^ Sabrina Ricci (March 6, 2012). "The New Kindle Format (KF8)". Digital Pubbing. Archived from the original on April 23, 2019. Retrieved September 29, 2018.
  7. ^ "Amazon Throws A Minor Curveball With HTML5-Powered Kindle Format 8" Archived 2017-08-15 at the Wayback Machine, TechCrunch, October 20, 2011.
  8. ^ Kindle eBooks with Improved Typography Use New KFX File Format Archived 2019-04-18 at the Wayback Machine. Retrieved 11 August 2015
  9. ^ "Kindle Create: A New Ebook Conversion Tool". EpubSecrets. April 6, 2017. Archived from the original on February 25, 2020. Retrieved February 25, 2020.
  10. ^ a b "Learn About Sending Documents to Your Kindle Library". Amazon. Archived from the original on January 25, 2022. Retrieved 2022-05-04.
  11. ^ Michael Kozlowski (April 30, 2022). "The Amazon Kindle will support EPUB in late 2022". Good E-Reader. Archived from the original on May 4, 2022. Retrieved May 7, 2022.
  12. ^ Michael Cavacini (2022-05-04). "Amazon Kindle Will Support EPUB Books, Abandoning MOBI Format". michaelcavacini.com. Archived from the original on 2022-05-04. Retrieved 2022-05-04.
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