Convert AZW to AZW3

The AZW file extension, standing for Amazon Word, is a proprietary eBook format developed by Amazon for its Kindle devices. Introduced in 2007, AZW files are based on the MOBI format, offering enhanced compression and DRM protection to prevent unauthorized copying. These files store eBooks along with bookmarks, annotations, and last-read locations. Initially used on first-generation Kindles, AZW has evolved into AZW3 (KF8) and KFX formats, supporting advanced features like HTML5 and CSS3. AZW files are primarily used for distributing and reading eBooks on Kindle devices and apps.

The AZW3 file extension, also known as Kindle Format 8 (KF8), is a proprietary eBook format developed by Amazon. Introduced in 2011 alongside the Kindle Fire, AZW3 supports advanced formatting features such as HTML5 and CSS3, enhancing the visual presentation of eBooks. It is primarily used for Amazon Kindle devices and applications, providing a richer reading experience compared to its predecessor, AZW. The format is backward-compatible with MOBI, ensuring older Kindle devices can still access the content.