WOFF to XZ Converter
Processing entirely on your device — large files may take a moment.
Web Open Font Format and XZ Compressed File exist for different jobs: WOFF is the older web font format (version 1) — larger than WOFF2 but still required by some legacy browser support matrices and old @font-face stacks. Unpack XZ into ZIP/TAR for tools that cannot read LZMA2.
This converter runs entirely in your browser using WebAssembly — your files never leave your device, nothing is uploaded, and there are no watermarks, sign-ups or queues. Drop in several files at once to convert them as a batch.
How to convert WOFF to XZ
- 1
Select your files
Select your WOFF 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 WOFF format
WOFF (Web Open Font Format, 2010) wrapped TTF/OTF data in a web-first container: zlib compression (~40% smaller), strict table structure, and optional license metadata that foundries required before allowing web embedding. It powered the first generation of real web typography under @font-face.
Its successor WOFF2 compresses better with Brotli and has since become the only format modern sites ship. WOFF remains useful for one reason: legacy browsers (IE9–IE11 era) that never learned WOFF2.
+Strengths
- ✓Compressed and web-legal by design
- ✓Works back to IE9-era browsers
!Limitations
- −Superseded by WOFF2 everywhere current
- −Larger than WOFF2 for identical glyphs
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 WOFF to XZ?
Think of it as moving your file to the container that fits the job. Superseded by WOFF2 everywhere current XZ works differently: Highest common ratio If any of that sounds like your task, run the conversion — it takes seconds and nothing leaves your device.
Frequently asked questions
Is this WOFF 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 WOFF 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.
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.
Are the files inside my WOFF 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.