GLB to STL Converter

Turn a .glb or .gltf model into an .stl your slicer can print. Units and axes are converted for you, and the mesh is welded into clean geometry.

How to convert GLB to STL

Drop the .glb above.
Check the size under the 3D view — glTF is in metres, so game and character models can be huge in millimetres.
Keep STL selected (tick One file per object for separate STLs) and download.

What changes

Metres become millimetres and Y-up becomes Z-up, so the model stands on the bed.
Vertices that glTF splits for normals and textures are merged, giving a closed mesh where the model is closed.
Colours and textures are dropped — STL has none. Use GLB to 3MF to keep material colours.
Rigged or animated models are taken in their rest pose.

Frequently asked questions

My STL is far too big in the slicer.

glTF stores metres; a 1.8 m figure becomes 1800 mm. Scale it down in the slicer (for example to 5% for a 90 mm figure).

Can I convert GLB to STL without Blender?

Yes — that is what this page does, in the browser.

Is my model uploaded?

No. It never leaves your computer.