Free online EPUB to AZW3 converter optimized for Amazon Kindle devices. No signup, no watermark.
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Optimized for Amazon Kindle devices
Better formatting than older MOBI format
Free and unlimited conversions
No registration required
Automatic file deletion after 1 hour
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AZW3 is Amazon's advanced ebook format, designed specifically for modern Kindle devices. It is based on the older MOBI format but includes significantly better support for typography, custom fonts, CSS styling and complex layouts. AZW3 is the recommended format for reading ebooks on any Kindle device purchased after 2011.
Unlike MOBI, AZW3 handles images, tables and advanced formatting much more accurately, making it the best choice for textbooks, cookbooks and any ebook with complex visual content.
EPUB is the most widely used ebook format but it is not natively supported on Amazon Kindle devices. Converting EPUB to AZW3 gives you the best possible reading experience on your Kindle, with proper formatting, fonts and chapter navigation.
AZW3 is superior to MOBI for modern Kindle devices because it supports a wider range of formatting features and renders text more accurately. If you own a Kindle Paperwhite, Kindle Oasis or any recent Kindle model, AZW3 is the recommended conversion format.
Once you have converted your EPUB to AZW3, you can transfer the file to your Kindle in two ways. The first option is via USB: connect your Kindle to your computer and copy the AZW3 file to the documents folder. The second option is via email: send the file as an attachment to your Kindle email address and it will be delivered wirelessly to your device. EPUBKit makes this second option even easier with the Send to Kindle button available after every conversion.
Yes, EPUBKit is completely free to use. No signup, no subscription and no watermarks. You can convert unlimited EPUB files to AZW3 at no cost.
AZW3 is Amazon's advanced ebook format used in modern Kindle devices. It supports better typography, custom fonts and improved layout compared to the older MOBI format. It is the recommended format for reading ebooks on current Kindle models.
Yes. After converting your EPUB to AZW3, EPUBKit lets you send the file directly to your Kindle email address with one click. Your file will appear on your Kindle device within minutes.
For modern Kindle devices, AZW3 is the better choice as it supports improved formatting and typography. MOBI is more compatible with older Kindle models. If you are unsure, AZW3 is recommended for any Kindle purchased after 2011.
Yes. All uploaded files are processed securely and automatically deleted after 1 hour. We never store, read or share your files.