3MF to GZ Converter
Processing entirely on your device — large files may take a moment.
Unpack a .gz into a normal file or repack it as ZIP/TAR when the receiving tool does not understand gzip. If your files are still in 3MF format, this page is the shortcut: 3MF is the modern 3D-printing format: an OPC zip of XML model parts with materials and units — STL's successor designed by Microsoft, HP and the printing industry.
iLoveConverter processes everything locally on your computer, which makes it private and fast: no upload wait, no server storage, no limits. Add as many files as you like — batch conversion is built in.
How to convert 3MF to GZ
- 1
Select your files
Select your 3MF 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 3MF format
3MF is what STL should have been: an OPC zip containing XML model parts with real units, materials, colors and print settings — designed by a consortium (Microsoft, HP, Ultimaker, Prusa) to fix STL's missing-everything problem. Modern slicers prefer it.
The XML model inside parses straight into a three.js scene, so 3MF converts to glTF for previews or OBJ for DCC tools without ever opening a slicer.
+Strengths
- ✓Units, materials and metadata included
- ✓Industry-backed open standard
- ✓Modern slicers prefer it over STL
!Limitations
- −Older printers still want STL
- −XML verbosity for huge meshes
- −Extension namespaces vary by vendor
About the GZ format
A .gz file is one file squeezed by gzip — not an archive. kernel.org tarballs are “tar inside gz”, but plenty of logs, JSON dumps and CSV exports travel as plain .gz. Opening one means decompressing it back to the original bytes.
Repacking into ZIP or TAR gives the decompressed file a container that every GUI tool opens without a second thought.
+Strengths
- ✓Everywhere on Linux and macOS
- ✓Fast, well-understood compression
- ✓Streams natively from any tool
!Limitations
- −Single file only — no directory tree
- −No encryption or integrity metadata
Why convert 3MF to GZ?
There is a concrete reason this conversion exists: Older printers still want STL GZ sidesteps that — Everywhere on Linux and macOS If that is your situation, the tool above settles it in seconds, entirely on your device.
Frequently asked questions
Is this 3MF to GZ 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 3MF to GZ?
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.
What about folders and directory structure?
The full directory tree is preserved: folders stay folders, and deep paths arrive exactly as they were packed in the 3MF file.
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.