How to convert EPUB to Kindle (AZW3)
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Upload your file
Drag and drop a file or click to select one. Keep this page open while the file uploads and converts.
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Convert EPUB to Kindle (AZW3)
NexMedia converts EPUB to Kindle (AZW3) on its own servers. Processing time depends on the file size and how busy the queue is.
- 3
Download the converted file
When the conversion finishes, the download appears on this page. Your converted file is kept for 2 hours, then deleted.
About EPUB
EPUB is the open ebook standard, now maintained by the W3C. An EPUB is a ZIP of XHTML pages, CSS and images, so the text reflows to fit any screen.
Ebooks from most stores and libraries, read in Apple Books, Kobo and Google Play Books, and on Kindle through Send to Kindle since 2022.
Store-bought EPUBs are often DRM-protected, and protected files cannot be converted.
Convert EPUB to AZW3 online free, no account required — AZW3 is Amazon's Kindle Format 8 ebook format.
Change EPUB to AZW3 without losing quality — convert EPUB to AZW3 free in your browser.
Why does my EPUB book look completely different on every reader? EPUB is reflowable by design — text reshapes itself to each screen and font — so there is no fixed page layout to preserve.
About Kindle (AZW3)
AZW3, also called KF8, is Amazon's Kindle Format 8, introduced in 2011 with HTML5 and CSS3 formatting.
Kindle ebooks with a richer layout than MOBI; Kindle devices and Calibre read it.
Books bought from Amazon usually carry DRM, and DRM-protected files cannot be converted.
Why convert an ebook to AZW3? To load it onto a Kindle in Amazon’s native format, with better typography support than old MOBI.
What changes when you convert EPUB to AZW3
- Ebook conversion is best-effort: the text, images and table of contents of the EPUB carry over to AZW3, but layout and styling can change.
- Fixed layouts, embedded fonts and complex styling in the EPUB may not survive the move to AZW3.
- EPUB files can carry DRM copy protection; protected files are detected and refused, because copy protection is never removed.
Settings you can change
Before you convert EPUB to AZW3, you can adjust: Title, Author, Language, Page size, Base font size, and Generate table of contents.
Limits
Each plan sets a maximum file size and a number of conversions per day, and video and audio files also have a maximum length. Guests can convert files up to 100 megabytes and 5 per day; a free account raises this to 500 megabytes and 25 per day; paid plans go up to 100 gigabytes.
Your converted AZW3 file is kept for 2 hours, then deleted.
EPUB to AZW3: questions and answers
Does converting EPUB to AZW3 reduce quality?
Ebook conversion is best-effort: the text, images and table of contents of the EPUB carry over to AZW3, but layout and styling can change.
What is the difference between EPUB and AZW3?
EPUB is the open, reflowable ebook standard. AZW3 is Amazon's Kindle Format 8 ebook format.
Can I change the settings when converting EPUB to AZW3?
Before you convert EPUB to AZW3, you can adjust: Title, Author, Language, Page size, Base font size, and Generate table of contents.
Do I need an account to convert EPUB to AZW3?
No. You can convert EPUB to AZW3 without an account; signing in raises the file-size and daily limits.
How long is my converted AZW3 file kept?
The AZW3 file you convert from EPUB is kept for 2 hours, then deleted automatically.
Will the page layout of my EPUB survive in the AZW3?
Fixed layouts, embedded fonts and complex styling in the EPUB may not survive the move to AZW3.
What happens if my EPUB file is copy-protected?
EPUB files can carry DRM copy protection; protected files are detected and refused, because copy protection is never removed.