Free 3D converter / STL to GLB
Convert STL to GLB, free and online
Turn a .stl file into a .glb file. It runs in your browser: no sign-up and nothing to install, and most files never leave your computer.
Drop your STL file here
or choose a file
Free · No sign-up · Converted in your browser · Files up to 1 GB
What you get: You get a single GLB with meshes, materials and textures, and animations when the file has them.
How to convert STL to GLB
- 1Drop your .stl file
On the converter above, or click to choose it. - 2Check the units
STL files don't store them. Pick millimetres, centimetres, metres or inches so the size is right. - 3Click Convert to GLB
The .glb file downloads straight away.
STL vs GLB
STL: STL describes a shape as triangles only: no units, no colours, no curves. It's what 3D printers, slicers and scanners use.
GLB: GLB is binary glTF, the standard for 3D on the web: meshes, PBR materials, textures and animation in one file.
Other conversions
All conversions →Is the STL to GLB converter free?
Yes, with no sign-up and no limit on the number of files. A free account is only needed if you want to send the model to someone for feedback.
Is my file uploaded?
Most files are read and converted right in your browser and never leave your computer. Very large CAD and mesh files are converted on our server instead, then deleted straight after the converted model is sent back to your browser.
What's the biggest STL I can convert?
Up to 1 GB. Big files take longer, and very large CAD files go through our server, as above.
Why does it ask for units?
STL files don't record their unit, so the same numbers could be millimetres or inches. Pick the one the file was made in, and check the size shown, so the GLB comes out the right size.
Converting it to send to a client or supplier?
Send them a link instead. They open the model in any browser, with no account and no CAD program, and click the spot they want changed.