MOBI & AZW3 to EPUB
MOBI · AZW · AZW3 · Client-side · No upload
Apple Books, Kobo and most readers outside Amazon's take EPUB, not Kindle formats. Drop a DRM-free MOBI, AZW or AZW3 here and get an EPUB back, with its chapters, images, cover, fonts and table of contents. The conversion happens in your browser tab.
Drop a MOBI, AZW or AZW3 file here
When converting is worth it
Your reader only takes EPUB. Apple Books, Kobo e-readers, Lithium and most library apps don't open Kindle formats. Converting is the only way in.
An old MOBI renders badly. MOBI 6 files from the Mobipocket era break on modern readers in small ways: odd spacing, giant fonts, no contents list. The EPUB maps their presentational markup onto CSS, which every EPUB reader handles.
You don't need to convert for GemReader. It opens MOBI, AZW and AZW3 directly on Android, iPhone and iPad, next to your EPUBs and PDFs, and every highlight becomes a flashcard. Guides for Android and iPhone.
Not sure the file is unlocked? The Kindle DRM Checker reads the same flag the converter checks, without converting anything. Once you have the EPUB, the EPUB Metadata Editor fixes a wrong title, author or cover.
Questions
Does it convert Kindle Store books?
No. Books bought from Amazon carry Kindle DRM, which locks them to the Kindle app on the buying account. The converter reads the encryption flag before anything else and stops if it is set. Removing DRM is a legal grey area in most countries and not something this site helps with.
What about .kfx files?
KFX is Amazon's newer container, not a MOBI variant, and every KFX delivered by Amazon is DRM-protected. The converter recognises it and says so rather than producing a broken file.
Will the formatting survive?
From AZW3, nearly all of it. KF8 files store real XHTML, CSS and embedded fonts, and the converter reassembles them as the publisher wrote them, rewriting Kindle's internal links into ordinary EPUB ones. Old MOBI 6 files are early-2000s HTML with presentational tags; those become CSS, so expect a plainer but clean result. A joint .mobi carries both versions, and the converter uses the better KF8 copy.
What does the EPUB contain?
An EPUB 3 package with an EPUB 2 table of contents alongside, so older readers get a contents list too. Chapters are split where the original split them, the cover is marked as the cover, and the title, author, publisher, language, description and subjects are copied from the Kindle metadata. Links inside the book, including the table of contents, point to the right chapter and paragraph.
Is the book uploaded?
No. The conversion runs in JavaScript in your browser tab and the EPUB is saved straight from memory. It keeps working with the network off once the page has loaded.
Does it work on a phone?
Yes, in Safari on iPhone and iPad and Chrome on Android: pick the file from Files or Downloads and the EPUB is saved back. The whole book is held in memory while converting, so very large illustrated books (100 MB and up) are better done on a computer.