MOBI to EPUB Converter turns a Kindle ebook into an EPUB 3 file that works in almost every reading app outside the Amazon world: Apple Books, Kobo, Google Play Books, Calibre, Thorium, Moon+ Reader and many more. Drop in a DRM-free .mobi, .azw3, .azw or .prc file and the EPUB is ready to download a moment later. Both Kindle generations are supported, the older MOBI (KF7) and the newer KF8 format used in AZW3 files. The converter rebuilds the book into chapters, keeps the table of contents with its sub-entries, so a book split into parts still lists every chapter, and turns internal links such as footnote references and contents links into working EPUB links. The cover, the images, and the title, author, publisher, description, language, publication date and subjects are carried over into the EPUB metadata. The book styling is simplified to a clean default layout, which every reader then lets you adjust. Everything runs in your browser: the book is never uploaded. Kindle store purchases with DRM cannot be converted. After converting you can edit the title, author or cover of the EPUB with EPUB Metadata Editor, read it right away in EPUB Reader, or make a PDF with MOBI to PDF Converter.
Amazon built the Kindle on Mobipocket, a format designed for the tiny screens of early 2000s handhelds, and kept extending it for more than a decade. The result is that a Kindle book comes in one of three shapes. Old MOBI files, often labeled KF7, store the whole book as one long HTML document with page break tags between chapters and links expressed as byte positions. KF8 files, sold and shared as AZW3, store modern XHTML and CSS, but cut into skeletons and fragments and stitched together through index tables. Many files produced by Kindlegen and Calibre contain both versions back to back, separated by a boundary record, so that old and new devices can each read their own half. EPUB, by contrast, is a ZIP archive of ordinary XHTML chapters with a manifest and a table of contents, which is why almost every reading system can open it. Converting means reading whichever Kindle version is present, preferring KF8 when both exist, rebuilding the chapter files, translating byte-position or fragment links into normal anchors, and copying the metadata from the EXTH header into the EPUB package. The navigation index, the Kindle equivalent of an EPUB table of contents, provides chapter titles and their nesting. DRM is the one thing no converter should touch: Kindle store purchases are encrypted, and only DRM-free files can be converted.