Uwarp

DRM-free EPUB only. The download is an AZW3 file of the chapter text. Conversion stays in this browser.

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Convert an EPUB file to AZW3

Convert an EPUB file to AZW3 in your browser. No signup, chapter text is kept, and the file stays on your device.

What is EPUB to AZW3 conversion?

EPUB is an open ebook. AZW3 is Kindle Format 8. This page writes the chapter text of a DRM-free EPUB into an AZW3 file.

EPUB to AZW3 converter features

Save a DRM-free EPUB as an AZW3 ebook.

  • EPUB to AZW3

    Upload an .epub file and download a .azw3 file.

  • Chapter text in order

    The text of each chapter is written into the AZW3 file.

  • A KF8 ebook

    The download is Kindle Format 8, the .azw3 file.

  • Browser-side conversion

    The EPUB stays on your device. No account is required to convert EPUB to AZW3.

How to convert EPUB to AZW3

Three steps from an EPUB to an AZW3 file.

  1. Add the EPUB

    Drop a DRM-free .epub file. The converter reads it in your browser.

  2. Convert to AZW3

    Click Convert to AZW3. Chapter text is written into a KF8 file.

  3. Download the AZW3

    Save the .azw3 file.

Tips for converting EPUB to AZW3

What this converter keeps from an EPUB.
  • 01

    Use a DRM-free EPUB

    An encrypted EPUB is rejected.

  • 02

    Pictures stay behind

    The AZW3 file contains the chapter text. Pictures are left out.

  • 03

    MOBI is a different file

    This download uses the .azw3 extension. The EPUB to MOBI page writes .mobi.

Good uses for an EPUB to AZW3 converter

When a reader asks for an AZW3 file.

  1. Make an AZW3 ebook: Turn a DRM-free EPUB into a .azw3 file.

  2. Keep the chapter text: The words stay in reading order.

  3. Keep the book unlocked: The download is not wrapped in Kindle DRM.

Why convert EPUB to AZW3 here

A local EPUB to AZW3 conversion of the chapter text.

  • No signup

    Convert an EPUB without an account.

  • Stays on your device

    Reading and AZW3 writing run in the browser.

  • A .azw3 file

    The download is a KF8 ebook.

Technical details

How this EPUB to AZW3 conversion works.
Input
A DRM-free EPUB file up to 20 MB.
Output
An AZW3 file (Kindle Format 8) with the chapter text in order.
What is left out
Pictures are not copied. The older .mobi file is not written. Kindle DRM is not added.
Where it runs
The EPUB is read locally in the browser. The file is not uploaded for conversion.

Sources & References

References for the EPUB this converter reads and the AZW3 file it writes.
  • “EPUB is an e-book file format that uses the ".epub" file extension.”
    — Wikipedia — EPUB

    EPUB: This tool reads that ebook package when it is DRM-free. en.wikipedia.org/wiki/EPUB

  • “E-book files in the Kindle File Format originally had the filename extension .azw; version 8 (KF8) introduced HTML5 & CSS3 features and had the .azw3 extension; and version 10 introduced a new typesetting and layout engine featuring hyphens, kerning and ligatures and has the .kfx extension.”
    — Wikipedia — Kindle File Format

    Kindle File Format: The download is that .azw3 file, with the chapter text. en.wikipedia.org/wiki/Kindle_File_Format

Frequently Asked Questions

Quick answers about this tool—open a question to read more.