Convert GLB to STL
Convert a GLB into an STL for 3D printing.
Free, no account, up to 50 MB per file. Uploads are private and deleted after 24 hours unless you sign in, which claims them and keeps them for 7 days.
What survives GLB → STL
- Geometry
What is not carried across
- Materials and textures — the target format cannot store them.
- UV coordinates.
- Object names and scene hierarchy.
About GLB files
- GLB bundles geometry, materials and textures into one file, which is why it converts cleanly in both directions.
- Skinned meshes and morph targets are refused rather than silently flattened — the result would not be the model you uploaded.
Why STL
- The format every slicer and 3D printer toolchain accepts.
- Nothing but triangles, so there is nothing to go wrong on import.
Common problems
- The colours are gone.
- STL cannot store them. If you need colour for printing, use a format your printer's toolchain supports, such as PLY or 3MF.
- Separate parts have merged.
- STL has no notion of objects. Every triangle in the GLB ends up in one soup, which is what the format is.
After converting
Converting changes the container, not the geometry — a heavy model stays heavy. If the result is destined for the web or a game engine, reducing its triangle count is the part that makes it load faster.