AZW3
Kindle e-book (AZW3)
AZW3, also called Kindle Format 8, replaced MOBI on Kindles in 2011 and added proper HTML5 and CSS styling. Only Amazon's readers and Calibre open it.
Opens in Kindle devices and apps, Calibre
AZW3 converterAZW3 to EPUB converter, free and without sign-up.
Turn AZW3 e-books into EPUB. This conversion runs on our server: after you confirm, the file is uploaded over an encrypted connection, converted and then deleted.
Drop AZW3 files here
or choose from your computer paste with Ctrl V
from Photos or Files
Ready · other file types work tooAsks before any upload
Convert to
- Server conversion · file is uploaded
- Encrypted in transit
- Deleted after conversion
- No account
How to convert AZW3 to EPUB
Add your AZW3 e-books
Drop AZW3 (KF8) files onto the box above, or click it to choose them. ToAny reads the file's contents to detect the type, so a wrong extension does not matter.
EPUB is already chosen
Press Convert and confirm the upload. The file is sent to the ToAny conversion server, converted to EPUB and removed afterwards.
Download
Save the EPUB, or download everything as one ZIP if you converted several files.
Why ToAny
Honest about uploads
Browsers cannot convert AZW3 to EPUB reliably, so this pair runs on our server. You are asked before anything is sent, and the page says so plainly.
Removed afterwards
The uploaded file and the result are deleted once the conversion has finished. Nobody looks at them and they are not used for anything else.
No account
No sign-up, no email address and no watermark on the result.
AZW3 to EPUB: what to expect
AZW3 is only opened by Kindle devices and apps. EPUB reflows to fit any screen and opens in most e-reader apps. AZW3 is at home in books on Kindle; EPUB is the usual choice for e-books that adapt to any screen size.
AZW3 vs EPUB
EPUB
EPUB e-book
EPUB is the open standard for e-books. Text reflows to fit the screen and the reader chooses the font and size. Almost every e-reader other than older Kindles opens it directly.
Opens in Apple Books, Kobo, Google Play Books, Calibre and, since 2022, Send to Kindle
EPUB converter| AZW3Kindle e-book (AZW3) | EPUBEPUB e-book | |
|---|---|---|
| Stands for | Kindle Format 8 | Electronic Publication |
| Type | Reflowable e-book | Reflowable e-book |
| Compression | Proprietary container | ZIP container of XHTML |
| Introduced | 2011, by Amazon | 2007, by the International Digital Publishing Forum (now W3C) |
| Opens in | Kindle devices and apps, Calibre | Apple Books, Kobo, Google Play Books, Calibre and, since 2022, Send to Kindle |
| Best for | Books on Kindle | E-books that adapt to any screen size |
| File extension | .azw3, .azw | .epub |
Questions
Is my AZW3 file uploaded?
Yes, for this conversion. Browsers cannot convert AZW3 to EPUB reliably, so after you confirm, the file is uploaded over an encrypted connection to the ToAny conversion server, converted automatically and deleted once the conversion has finished. Most other conversions on ToAny run in your browser and upload nothing.
Is anything lost when converting AZW3 to EPUB?
Text is kept. Formatting carries over only as far as EPUB supports it.
Can I convert several AZW3 files at once?
Yes. Add as many as you like, convert them together and download each result or all of them as one ZIP.
How do I convert AZW3 to EPUB on Windows, Mac, iPhone or Android?
The steps are the same everywhere because ToAny runs in the web browser: open this page in a current version of Chrome, Edge, Safari or Firefox, add the AZW3 file, press Convert and save the EPUB. There is nothing to install.
Is there a file size limit?
Yes. Files sent to the conversion server are capped in size, and the page tells you when a file is too large to upload.