Convert glTF to 3MF
Convert a glTF file to 3MF in your browser. Free, no upload, no sign-up.
Convert glTF files to 3MF directly in your browser. The converter parses the glTF mesh, rebuilds it in memory and writes it out as 3MF, keeping every triangle. Nothing is uploaded, there is no file size limit beyond your computer's memory, and the result downloads instantly. 3MF records the unit and can hold several objects with colors, so the model opens in the slicer at the right size without guessing.
How to convert glTF to 3MF
- 1Drop your glTF file
Drag a .gltf file onto the box above or click to choose one. Only self-contained .gltf files (embedded buffers) can be imported here, because external .bin and texture files cannot be resolved in the browser.
- 2Check the preview
The model renders in 3D so you can confirm it loaded correctly. Dimensions, volume and triangle count are shown next to it; open edges are flagged if the mesh is not watertight.
- 3Download the 3MF
Adjust the export options if needed and click download. The exported file declares millimeters as its unit and contains the mesh as a single object.
What is a glTF file?
glTF is the JSON form of the same Khronos standard as GLB. The .gltf file describes the scene as readable JSON; binary buffers and textures may be embedded as base64 or kept as separate files. It is convenient when you want to inspect or edit the scene description by hand.
Commonly used by: web developers, Babylon.js / three.js, Blender, Unity and Unreal importers
Only self-contained .gltf files (embedded buffers) can be imported here, because external .bin and texture files cannot be resolved in the browser.
What is a 3MF file?
3MF is the modern replacement for STL, published by the 3MF Consortium (Microsoft, Autodesk, HP, Prusa and others). It is a ZIP archive containing XML that stores units, colors, materials, multiple objects and print settings. Slicers such as Bambu Studio and PrusaSlicer use it as their project format.
Commonly used by: Bambu Studio, PrusaSlicer, Cura, Windows 3D Builder, Fusion 360
3MF records the unit and can hold several objects with colors, so the model opens in the slicer at the right size without guessing.
glTF vs 3MF
| glTF | 3MF | |
|---|---|---|
| Full name | GL Transmission Format | 3D Manufacturing Format |
| Encoding | Text | ZIP container |
| Geometry type | Triangle mesh | Triangle mesh |
| Colors | Yes | Yes |
| Textures | Yes | Yes |
| Materials | Yes | Yes |
| Stores units | Yes | Yes |
| Multiple objects | Yes | Yes |
| Typical use | web developers, Babylon.js / three.js, Blender | Bambu Studio, PrusaSlicer, Cura |