EPUB to AZW3 Converter
Convert EPUB to AZW3 online for Kindle devices and apps. Keep chapters, book details, text, and supported images in a modern Kindle format.
Drop your EPUB files here
Up to 50MB per file.
Conversion Settings
Automatic is best for most books.
Book details and layout
Files are encrypted and auto-deleted after conversion
How to Convert
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Upload your EPUB files
Drag and drop or select EPUB files from your device. You can upload multiple files at once.
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Choose book settings
Use Automatic for a broadly compatible result, or choose a reading device. Book title, author, margins, and text size are available under Book details and layout.
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Download AZW3 files
Download the converted AZW3 ebook, or collect completed batch conversions in a ZIP.
Why convert EPUB to AZW3?
EPUB is a reflowable ebook format supported by modern reading apps and e-readers. Converting it to AZW3 creates an Amazon Kindle ebook format that supports richer styling than legacy MOBI, ready for workflows that use the destination format.
AZW3 works with compatible Kindle devices, Kindle reading workflows, and Calibre ebook libraries.
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View all ebook convertersFrequently Asked Questions
What does converting EPUB to AZW3 do?
It creates a genuine AZW3 file from your EPUB. EPUB is a reflowable ebook format supported by modern reading apps and e-readers, while AZW3 is an Amazon Kindle ebook format that supports richer styling than legacy MOBI. The result is ready for workflows that use the destination format.
What is retained in the EPUB to AZW3 conversion?
Supported text, images, tables, and document structure are carried from EPUB into a genuine AZW3 file, ready for continued work in compatible applications.
Which apps can open the converted AZW3 file?
AZW3 works with compatible Kindle devices, Kindle reading workflows, and Calibre ebook libraries.
Does EPUB to AZW3 run in my browser?
EPUB to AZW3 uses a compatible conversion engine on our server. The file is transferred over an encrypted connection, processed securely, and automatically deleted shortly after conversion.
Can I batch convert EPUB files to AZW3?
Yes. Add multiple EPUB files, convert them together, and download each AZW3 result separately or collect the completed batch in a ZIP file.
What is the EPUB to AZW3 file size limit?
EPUB files can currently be up to 50MB.