AZW to XZ Converter
Processing entirely on your device — large files may take a moment.
AZW is Amazon's DRM-era spelling of the MOBI format — same Kindle packaging, different extension on early Kindle store books. Unpack XZ into ZIP/TAR for tools that cannot read LZMA2.
Because the whole conversion happens on your device, it is instant, unlimited and genuinely private — no accounts, no watermarks, no files on anyone's server. Multiple files are converted in one go.
How AZW compares to XZ
| AZW | XZ | |
|---|---|---|
| Layout | Reflowable, dated engine | One compressed member |
| Bundling | Single self-contained file | Single file |
| Best for | Legacy Kindle devices | Packages and releases |
How to convert AZW to XZ
- 1
Select your files
Select your AZW file.
- 2
Convert instantly
The file bytes are gzip-compressed in place — the same archive your server or build tool produces, made locally.
- 3
Download results
Download the .gz file — ready to upload, serve or attach.
About the AZW format
MOBI is the Mobipocket format Amazon adopted for the original Kindle (2007), later extended as KF8/AZW3. It reflows text like EPUB but with a fraction of the formatting capability — basic styles, images, bookmarks — and its metadata model is decades old. Amazon stopped accepting MOBI uploads for reflowable ebooks in 2022 in favor of EPUB.
Its remaining role is old hardware: early Kindle models and some e-readers that never learned EPUB. Note that DRM-protected Kindle books (AZW/KFX with encryption) are a separate, legally distinct matter from converting MOBI files you created or that are DRM-free.
+Strengths
- ✓Supported by legacy Kindle hardware
- ✓Compact and self-contained
!Limitations
- −Deprecated by Amazon since 2022
- −Weak formatting compared to EPUB3
- −Modern Kindle models prefer EPUB/AZW3
About the XZ format
XZ wraps the LZMA2 algorithm: the best ratio of the common Unix compressors, which is why distribution packages and source releases pick it when bandwidth matters more than CPU.
Windows Explorer and many cross-platform tools cannot open it — unpacking to ZIP or TAR makes the payload portable.
+Strengths
- ✓Highest common ratio
- ✓Standard for Linux packages
- ✓Integrity checks built in
!Limitations
- −Memory-hungry at high settings
- −Sparse support outside Linux
Why convert AZW to XZ?
Converting makes sense where the strengths of XZ meet what AZW cannot give you. Highest common ratio Meanwhile Deprecated by Amazon since 2022 One pass through the converter above puts your file on the right side of that trade-off.
Frequently asked questions
Is this AZW to XZ converter really free?
Yes — completely free, with no sign-up, no watermark and no daily conversion limits. The site is supported by advertising.
Are my files uploaded to a server?
No. The conversion runs entirely inside your browser using WebAssembly, so your files never leave your device — that is what makes it instant and private.
Does it work on Windows, Mac, iPhone and Android?
Yes. Anything with a modern browser works: Windows, macOS, Linux, Android and iOS. No software installation is required.
Is there a file size limit for AZW to XZ?
The only limit is your device's memory, since nothing is uploaded. Files up to a few hundred megabytes work fine on a modern desktop browser; very large files simply take a little longer.
Are the files inside my AZW archive modified?
No. Contents are unpacked in memory and repacked into XZ byte-for-byte — the conversion changes the container, never the files inside it.
Is there a size limit for archive conversion?
There is no upload cap because nothing is uploaded — the practical limit is your device memory. A few hundred megabytes of unpacked content works comfortably on a modern computer.