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EPUB to MOBI

Convert EPUB ebooks to Kindle MOBI format. Browser conversion isn't possible for this format — follow the free step-by-step methods below.

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Browser conversion not available for MOBI output

MOBI is a proprietary Kindle format that cannot be created in-browser. Use one of the free methods below — or simply send your EPUB directly to Kindle.

Free Ways to Convert

Calibre — EPUB to MOBI / AZW3

Recommended

Download Calibre from calibre-ebook.com. Add your .epub file, right-click → Convert books → Convert individually. Set Output format to MOBI (or AZW3 for newer Kindles) → OK.

Send to Kindle (EPUB directly)

Easiest

Go to amazon.com/sendtokindle. Upload your EPUB file — Amazon converts and sends it to your registered Kindle device automatically. No software needed.

Kindle for PC / Mac — drag & drop

No conversion

Newer versions of the Kindle app (Windows/Mac) accept EPUB files directly. Drag the .epub onto the Kindle app window to add it to your library.

Work with your EPUB file directly

Convert EPUB to PDF Convert PDF to EPUB

What is EPUB to MOBI?

EPUB to MOBI converts open EPUB ebooks into the Kindle-compatible MOBI format. MOBI is the format used by Amazon Kindle devices and apps. Note: Amazon now supports sending EPUBs directly to Kindle via the Send to Kindle service.

How It Works

MOBI is a proprietary binary format and cannot be created in a web browser. The free desktop app Calibre is the standard tool for converting EPUB to MOBI, AZW3, or any other ebook format.

Key Benefits

MOBI / AZW3 works on all Kindle devices and apps
Calibre is completely free and preserves all content
Amazon now also accepts EPUB via Send to Kindle
No file size limits when using Calibre offline
Calibre also lets you manage your ebook library

Frequently Asked Questions

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