Does Kindle support EPUB files?

Newer Kindle devices released in late 2022 and later support EPUB natively via the Send-to-Kindle service. Older Kindles like the Paperwhite (7th gen and earlier) and basic Kindle models require MOBI. Check your specific model's supported formats in your Amazon account settings before converting.

Can I convert DRM-protected EPUB files?

No. EPUB files protected with Adobe DRM or similar schemes cannot be converted because the browser cannot decrypt them. Only DRM-free EPUB files work. Common sources of DRM-free EPUBs include Project Gutenberg, Smashwords, and your own documents.

How do I get the MOBI onto my Kindle?

Connect your Kindle via USB and drag the MOBI file to the Documents folder. The book appears in your Kindle library immediately. Alternatively, email the MOBI to your Kindle's Send-to-Kindle address, which you can find in your Amazon account under Devices.

Are my files uploaded to a server?

No. The converter runs entirely in your browser using epub.js for parsing and a custom MOBI writer for generating the output file. Your EPUB file never leaves your device. There is no server-side storage, no upload, and no logging of file contents.

Does the conversion preserve images?

Yes. The tool extracts images from the EPUB manifest and embeds them in the MOBI file as image records. Cover images, inline illustrations, and chapter images are included. However, SVG images may not appear since MOBI does not support SVG natively.

How long does conversion take?

A typical 300-page novel (about 1.5MB EPUB) converts in 4 to 8 seconds. Larger books with many images take longer. A 50MB EPUB with 100 images might take 20 to 30 seconds. Processing time depends on the file size and the number of images to extract and embed.

Yes. The converter is completely free with no account required. There are no watermarks, no daily limits, and no hidden upsells. All processing runs in your browser, so there are no server costs to pass on to users.

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Conversion

EPUB to MOBI Converter Online Free

Convert EPUB ebooks to MOBI format so you can read them on Amazon Kindle devices and the Kindle app. EPUB is the standard format from most publishers and libraries, but older Kindle devices require MOBI. This tool parses the EPUB in your browser using epub.js, extracts chapters and images, and writes a MOBI file with proper metadata and chapter structure. No Calibre or software installation needed.