Any books bought directly through Amazon will be automatically converted if necessary.

Kindle e-readers can’t read EPUB files, which means you have to convert them to MOBI or AZW3.

If possible, you should always leave books in the format that they came in originally.

MOBI and AZW3 are Amazon’s proprietary formats used for Kindle devices.

EPUB is the most widely accepted and functional e-book format.

If you’re buying books for your Kindle from any other e-book retailers, you’ll need to know the differences between EPUB vs MOBI files and how to convert them.

Last Updated: 15 Feb'22 T16:33:36+00:00 Facts checked by Eugenie TiuĪmazon is by far the largest e-book retailer in the world, so it’s not surprising that it would have a proprietary Kindle format for e-books sold through its store and read on its e-book readers.

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Convert mobi to epub