Convert EPUB to AZW3

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convert . epub to . azw3

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EPUB is the standard format for eBooks. Tolino, Kobo, Apple Books, and most reading apps use it. However, Amazon takes a different approach, as Kindle devices use the AZW3 format (also known as Kindle Format 8 or KF8). If you want to read your eBooks on your Kindle, you should convert them to AZW3 beforehand for optimal display.

Will the formatting be preserved?

EPUB and AZW3 are technically very similar. Both are based on HTML and CSS, and both support embedded fonts and images. Therefore, nothing is usually lost during conversion. The text, chapters, table of contents, and images are automatically transferred to AZW3. Simply upload your EPUB file in the upload area. AZW3 is already selected as the target format. After clicking "Start Conversion," the file will be converted in just a few seconds.

What advantages does AZW3 offer over MOBI?

While the older MOBI format is still supported by many Kindles, it's technically outdated. AZW3 offers significantly more: embedded fonts, more complex layouts, and improved rendering of images and chapters. Anyone converting today should go straight to AZW3. The result simply looks better on the Kindle. However, we still offer MOBI conversion for older Kindles.

4.0/5(1 vote)

Last updated on April 26, 2026 by Sören Ramspeck with the experience of more than 128,424,245 converted files since 2013.

How to convert EPUB to AZW3 online?

Upload EPUB file Choose your EPUB file with the "Choose File" Button, Drag & Drop or import it directly from Dropbox/Google Drive.
Choose target filetype AZW3 is set as default target format. Change it if you need a different target filetype for your conversion.
Start Conversion Click "Start Converting!". Most files process in seconds, only the largest files may take a few minutes.
Download your AZW3 file Download your finished AZW3 file. Your files will be automatically deleted from our servers.

How to convert EPUB files online to AZW3

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Currently we support the following conversions with EPUB files:

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Information about the extensions for the conversion from EPUB to AZW3

From: EPUB

open e-book standard format

The epub (short for electronic publication) file extension signifies an e-book file that has been saved according to the EPUB standard. EPUB is a non-proprietary, vendor-independent e-book format that is based on HTML and is supported by a large numb …

File extension: .epub
More information and converters for EPUB

To: AZW3

Amazon's e-book format for Kindle

AZW3 is an e-book format developed by Amazon, also known as Kindle Format 8 (KF8). Amazon introduced it in late 2011 alongside the Kindle Fire to replace the aging MOBI format. Compared to MOBI, AZW3 offers significantly more design possibilities; fo …

File extension: .azw3
More information and converters for AZW3

Video-Tutorial: Convert EPUB to AZW3

File-Converter-Online.com converts your files for free – no registration, no installation, no watermarks. Works on any device - Windows, macOS, Linux, Android and iOS. The free version supports files up to 750 MB, with Premium up to 20 GB. Our servers are located in Germany, all files are encrypted during transfer and automatically deleted after conversion. Since 2013, we have converted over 128,424,245 files - if you have any questions or issues, you can reach us anytime via the contact form.