GLB to 3MF Converter

Turn a .glb or .gltf model — from Blender, a 3D scanner app, a game asset or an AI model generator — into a 3MF your slicer opens. Each mesh keeps its material colour.

How to convert GLB to 3MF

Drop your .glb (or a .gltf together with its .bin) above.
Check the size in the bar under the 3D view and untick anything you don't want to print.
Keep 3MF selected and click Download 3MF.

What is converted

Geometry of every mesh in the scene, with node positions, rotations and scales applied.
Units and axes: glTF uses metres with Y up, 3MF millimetres with Z up — both are converted, so the model stands on the bed.
Colours: each mesh part gets its material's base colour. Bambu Studio offers to map these colours to filaments.
Clean meshes: duplicate vertices that glTF keeps for normals and textures are merged.

Limits

Textures are not converted — parts use the material's base colour.
Draco- or Meshopt-compressed files can't be read; export again without mesh compression.
Animated or rigged models are taken in their rest pose.
Game and scan models are not always closed (watertight). Slicers usually repair small gaps; very open meshes may need fixing in Blender first.

Frequently asked questions

My model is huge (or tiny) in the slicer.

glTF stores metres, so a 1.8 m character becomes 1800 mm. Scale it in your slicer — the true size is shown under the 3D view before you export.

Can I convert GLB to STL too?

Yes: drop the GLB on the converter and choose STL. STL keeps geometry only.

Does it read VRM avatars?

VRM files are GLB inside, so their meshes open too; textures are not converted.

Is my model uploaded?

No. It is read and converted in this browser tab.