EPUB to AZW3
Convert your EPUB files into AZW3 format.
How to convert an EPUB to AZW3 online
Upload your EPUB book
Drag the .epub file you want to convert, or click to select it from your computer.
The server converts it with Calibre
Your file is uploaded to our server, where Calibre transforms it into AZW3, the format used by current Kindle devices.
Download your AZW3 file
As soon as the conversion finishes, you download your eBook ready for your Kindle and the original EPUB is deleted from the server.
Why convert your EPUB to AZW3 on PDFDocks?
AZW3 is the format used by current Kindles, so if you have a book in EPUB and want to read it on your Kindle, you need to convert it first. The conversion requires uploading the file to our server, because AZW3 cannot be generated with just JavaScript in the browser — we process it with Calibre. Your file is automatically deleted right after the conversion, with no copy remaining anywhere.
Which Kindles support AZW?
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The file is uploaded to our server because it's necessary to process it with Calibre, but it's deleted immediately after the conversion.
Why is AZW3 generated instead of AZW?
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Because Calibre can only generate AZW3, not the classic AZW format. AZW3 is also the format used by current Kindle devices.
Do I need to create an account to use this tool?
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PDFDocks cannot convert DRM-protected books. Remove protection first.
Why does this tool upload the file?
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Because generating a valid AZW3 requires Calibre, which can only run on a server, not directly in your browser.
Is the book's formatting preserved in the conversion?
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Yes, the text, images, and overall structure of the book are preserved when converting to AZW3.
How long does the conversion take?
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Usually a few seconds, although it can vary depending on the file size and server load at that moment.
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