Convert STL to GLB
Convert a STL file to GLB in your browser. Free, no upload, no sign-up.
Convert STL files to GLB directly in your browser. The converter parses the STL mesh, rebuilds it in memory and writes it out as GLB, keeping every triangle. Nothing is uploaded, there is no file size limit beyond your computer's memory, and the result downloads instantly. GLB is the format web browsers, AR viewers and e-commerce platforms expect; one self-contained file with materials included.
How to convert STL to GLB
- 1Drop your STL file
Drag a .stl 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 GLB
Adjust the export options if needed and click download. Meshes without materials get a neutral gray PBR material so the file renders correctly in viewers.
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
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
GLB is the format web browsers, AR viewers and e-commerce platforms expect; one self-contained file with materials included.
STL vs GLB
| STL | GLB | |
|---|---|---|
| Full name | Stereolithography | Binary glTF |
| Encoding | Text or binary | Binary |
| Geometry type | Triangle mesh | Triangle mesh |
| Colors | No | Yes |
| Textures | No | Yes |
| Materials | No | Yes |
| Stores units | No | Yes |
| Multiple objects | No | Yes |
| Typical use | 3D printer slicers (Cura, PrusaSlicer, Bambu Studio), CAD export, Thingiverse / Printables | web viewers (three.js, model-viewer), AR on iOS and Android, Sketchfab |