Convert EPUB to AZW3
Convert EPUB to AZW3 online, free — no installation, no sign-up.
or drop files here to convert EPUB → AZW3
Max file size 1 GB. Browser-side conversions have no upload limit.
How to convert EPUB to AZW3
Add your file
Drop your EPUB file above or click Choose Files.
Convert
We convert your file securely on our server over an encrypted connection.
Download
Grab your new AZW3 file — done.
What is EPUB?
EPUB is the open ebook standard with reflowable text supported by most e-readers.
What is AZW3?
AZW3 (KF8) is Amazon’s newer Kindle ebook format with richer formatting.
Frequently asked questions
Drop your EPUB file into the box above (or click Choose Files), then click Convert and download your new AZW3 file. No account or software needed.
Yes — this converter is completely free with no watermarks and no sign-up.
Yes. Files are sent over an encrypted (HTTPS) connection and automatically deleted from our servers within an hour.
You control the output. Use the advanced options (the gear icon) to set quality, and we preserve as much fidelity as the AZW3 format allows.