Step 1
Choose a GLB file
Select a self-contained .glb model up to 100 MB. The file remains on your device.
Free · Private · Browser-based
GLB to STL Converter Online
Turn binary glTF scenes into slicer-ready STL meshes without installing desktop software. Conversion runs locally, applies scene-node transforms, and converts standard GLB meter units to millimeters.
Drop GLB file here
or browse your computer
Max 100 MB · processed locally
Your GLB file stays on this device. Geometry is processed locally and is never uploaded.
How to convert GLB to STL
Step 2
Extract scene geometry
The browser reads triangle meshes, applies node transforms, and converts standard GLB meter units to millimeters.
Step 3
Download STL output
Download one binary STL, or a ZIP bundle when the GLB contains multiple mesh objects.
GLB and STL are different file formats
GLB is the binary container for glTF scenes. It can include mesh geometry, scene nodes, materials, textures, cameras, lights, and animations. STL stores triangle geometry only. Conversion applies each mesh node’s position, rotation, and scale, converts meters to millimeters, and discards non-geometric scene data.
| Property | GLB | STL |
|---|---|---|
| Geometry | Scene of triangle meshes | Triangle mesh |
| Scene data | Nodes, materials, textures, animation | Not supported |
| Units | Meters | Unitless values normalized to millimeters |
GLB to STL FAQ
Is the GLB file uploaded anywhere?
No. GLB parsing and STL generation happen locally in your browser.
Will GLB materials and textures appear in STL?
No. STL stores triangle geometry only, so materials, textures, colors, cameras, lights, and animations are not preserved.
Will the model keep the correct size?
GLB uses meters as its standard distance unit. The converter changes those values to millimeters for common STL slicing workflows. Verify dimensions in your slicer before printing.
What happens when a GLB contains multiple meshes?
Each detected mesh is exported as a separate STL file and packaged into one ZIP download.
Working with another mesh format?
Convert a Wavefront OBJ polygon mesh into print-ready STL output.