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MOBI to AZW3

Convert a Kindle MOBI ebook into an AZW3 (KF8) file with its chapters, images, cover, table of contents and metadata. Runs in your browser — the book is never uploaded. DRM-protected books can't be converted.

Input

Drop a file or browse
One file · application/x-mobipocket-ebook, application/vnd.amazon.ebook, application/octet-stream

A Kindle .mobi file without DRM.

Output

Your AZW3 will appear here to download.
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Embed widget

<iframe
  src="https://iotools.cloud/embed/pdf-converter/mobi-to-azw3/"
  width="100%" height="520" frameborder="0" scrolling="no" loading="lazy"
  title="MOBI to AZW3 — iotools.cloud"
  sandbox="allow-scripts allow-forms allow-same-origin allow-downloads allow-popups allow-popups-to-escape-sandbox"
  allow="clipboard-write"
  style="width:100%;border:1px solid #e5e7eb;border-radius:12px;overflow:hidden"></iframe>
<script src="https://iotools.cloud/embed.js" async></script>

Drop this into your own page — free, no key required, just a link back.

Also available with

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Guides

Convert a Kindle MOBI ebook into an AZW3 (KF8) file. The conversion runs in your browser, so the book is never uploaded.

How to use it

  1. Drop a .mobi file onto the upload box.
  2. Press Convert to AZW3.
  3. Download book.azw3.

What is carried over

  • The book's title, author, publisher, description and language.
  • All chapters in reading order, with the table of contents when the MOBI has one.
  • Images (JPEG, PNG, GIF) and the cover.

Limits

  • DRM-protected books can't be read. Only DRM-free files convert.
  • Internally the book is first read into EPUB form and then written as AZW3, so MOBI-only quirks are normalised rather than copied byte for byte.
  • Embedded fonts and WebP/SVG images are left out.

Frequently asked questions

Is my book uploaded anywhere? No. Everything happens on your device.

Why AZW3? It is Kindle's newer format: it supports CSS, working links and a real table of contents, which classic MOBI 6 does not.

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