Nia Brooks
Textures kept. Thanks a bunch!
GLTF to 3MF Converter: Free & Online
Convert GLTF files to 3MF format and prepare them for 3D printing in a single app.
- Free
- No sign-up
- No install
Open .gltf → select the mesh → Export → choose .3mf
Click Open Files and pick your .gltf file. Then click Export, choose .3mf in the Extension list and click Save.
How to convert GLTF to 3MF
Open your .gltf file
Click Open Files in the converter above and pick the file on your computer. It opens in your browser, with no sign-up.
Select the mesh
A glTF file opens as a group. In the scene list, expand the group and click the mesh inside it: Export works on one object.
Export as .3mf
Click Export, choose .3mf in the Extension list and click Save. The file downloads to your computer.
In the desktop app
- Install and sign in. Download MeshInspector for Windows, macOS or Linux and sign in. The free Community plan is enough.
- Open the file. Click Open Files and pick the .gltf file.
- Export. Expand the glTF group in the scene list, select the mesh, click Export and choose .3mf.
- Save. Pick a folder and save the .3mf file.
What to know about GLTF → 3MF
- glTF is a JSON scene format; a .gltf often refers to separate .bin and texture files, a .glb packs everything into one file.
- 3MF is a ZIP package around an XML model: it records units and can hold several objects and colors.
- A glTF opens as a group in MeshInspector: select the mesh inside it, and Export saves that one object as .3mf.
- glTF carries scenes, materials and textures for web viewers and game engines.
- A 3MF from a slicer may also carry plate layout and print settings; a plain mesh format keeps only the geometry.
Online or desktop
Online
The converter on this page runs the MeshInspector web app in your browser: no install, no sign-up. It suits single files; the web app works within your browser's memory.
Desktop
The desktop app runs on Windows, macOS (Apple silicon) and Linux. Use it for large files, many files, and the tools the web app does not have. The free Community plan covers opening and exporting; see Pricing for what the paid plans add.
FAQ
Do I need an account to convert GLTF to 3MF?
No. The converter on this page is the MeshInspector web app running in your browser without sign-up. Click Open Files and pick your .gltf file, select it in the scene list, click Export, choose .3mf in the Extension list and click Save. The converted file downloads to your computer.
Is the GLTF to 3MF converter free?
Yes. Opening a .gltf file and exporting it as .3mf use free tools, here, in the web app and in the desktop app on the free Community plan. Paid plans add tools such as Mesh Healer and automatic repair; the Pricing page lists what each plan includes.
Are colors and units kept?
3MF records units, while the source format may not, so check the size of the model after conversion. 3MF can carry colors and several objects, but the export writes the mesh geometry of the selected object, so check the result in your slicer before printing.
Is there a file size limit?
There is no fixed limit on this page, but the web app works within your browser's memory: up to about 4 GB, or 16 GB in browsers with 64-bit WebAssembly. For very large models, or many files, use the desktop app for Windows, macOS or Linux.
Free Community planWindows, macOS (Apple silicon) and Linux
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By Mesh Inspector TeamPublished: Updated:
