How to convert EPUB to AZW3
- Add your .EPUB file - drop it in the box above or click to browse.
- Convert it to .AZW3 in a few seconds.
- Download your new .AZW3 file.
What to expect
- DRM-protected EPUBs - from libraries or DRM-locked stores - cannot be converted; only DRM-free files work.
- Reflowable EPUBs convert cleanly; fixed-layout EPUBs such as comics or textbooks with precise positioning often lose formatting detail.
- Custom fonts embedded in the EPUB are usually replaced by the Kindle's built-in fonts - this is normal Kindle behavior, not a conversion error.
Frequently asked questions
Does converting EPUB to AZW3 reduce quality?
Text and images are preserved, but complex CSS layouts may not render identically on Kindle. Simple reflowable books convert with no visible difference.
Can I convert a borrowed library EPUB?
No - library EPUBs are DRM-protected and cannot be converted. Return the book through your library app as normal.
Do I need AZW3 if I just want to read on a Kindle?
Not always - sendtokindle.amazon.com accepts EPUB directly and delivers it wirelessly. AZW3 conversion is only needed for USB sideloading.
My converted AZW3 has the wrong title or a missing cover.
In Calibre, right-click the book, choose Edit metadata, set the correct title, author, and cover image, then convert again.
Programs that convert EPUB: Hamster Free eBook Converter · Calibre · Calibre for Mac · Calibre for Linux
