STL to GLB Converter

Convert .stl files to .glb — the compact glTF format used by web viewers, AR and game engines — with units and axes converted to the glTF standard.

How to convert STL to GLB

Drop one or more .stl files above.
Keep GLB selected.
Click Download GLB.

What the GLB contains

Each STL as its own named node with a simple PBR material.
Millimetres become metres and Z-up becomes Y-up, as glTF requires — the model shows at the right size in AR viewers.

Frequently asked questions

Can I add textures?

No — STL has no texture coordinates. Paint or texture the model in Blender if you need that.

Is my file uploaded?

No. Conversion runs in your browser.