KFX is a proprietary ebook file format developed by Amazon for use on its Kindle e-readers and Kindle apps. It is the successor to the AZW3 format and incorporates several improvements, including enhanced typesetting features, support for hyphenation, kerning, and ligatures, resulting in a more visually appealing reading experience. KFX also supports higher resolution images and improved font rendering. The format is DRM-protected, meaning that ebooks purchased from the Kindle Store are typically locked to a specific Amazon account and cannot be easily transferred to other devices or platforms without removing the DRM. KFX files are designed to provide a consistent and optimized reading experience across various Kindle devices and apps, ensuring that ebooks look their best regardless of the screen size or resolution. While KFX offers several advantages over older formats, it is primarily tied to the Amazon ecosystem, limiting its compatibility with other ebook readers and platforms. Converting KFX files to other formats often requires specialized software or tools capable of removing the DRM protection.