Convert GLB to STL
Convert a GLB file to STL in your browser. Free, no upload, no sign-up.
Convert GLB files to STL directly in your browser. The converter parses the GLB mesh, rebuilds it in memory and writes it out as STL, keeping every triangle. Nothing is uploaded, there is no file size limit beyond your computer's memory, and the result downloads instantly. STL is accepted by every slicer and 3D printer, so it is the safest format to hand to anyone who needs to print your model.
How to convert GLB to STL
- 1Drop your GLB file
Drag a .glb file onto the box above or click to choose one.
- 2Check the preview
The model renders in 3D so you can confirm it loaded correctly. Dimensions, volume and triangle count are shown next to it; open edges are flagged if the mesh is not watertight.
- 3Download the STL
Adjust the export options if needed and click download. Colors, textures and materials are dropped because STL cannot store them. Multiple objects are merged into one triangle soup; units are not recorded, so make sure the model is already in millimeters.
What is a GLB file?
GLB is the binary container for glTF 2.0, the "JPEG of 3D" maintained by the Khronos Group. A single .glb file bundles geometry, PBR materials, textures and animations, and is the standard format for 3D on the web and in AR viewers.
Commonly used by: web viewers (three.js, model-viewer), AR on iOS and Android, Sketchfab, game engines
What is a STL file?
STL is the oldest and most widely supported 3D printing format. It stores nothing but a list of triangles, with no color, texture, unit or scale information. Every slicer and almost every 3D tool can read it, which is why it is still the default exchange format for printable models.
Commonly used by: 3D printer slicers (Cura, PrusaSlicer, Bambu Studio), CAD export, Thingiverse / Printables
STL is accepted by every slicer and 3D printer, so it is the safest format to hand to anyone who needs to print your model.
GLB vs STL
| GLB | STL | |
|---|---|---|
| Full name | Binary glTF | Stereolithography |
| Encoding | Binary | Text or binary |
| Geometry type | Triangle mesh | Triangle mesh |
| Colors | Yes | No |
| Textures | Yes | No |
| Materials | Yes | No |
| Stores units | Yes | No |
| Multiple objects | Yes | No |
| Typical use | web viewers (three.js, model-viewer), AR on iOS and Android, Sketchfab | 3D printer slicers (Cura, PrusaSlicer, Bambu Studio), CAD export, Thingiverse / Printables |