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Your .glb is converted on your own computer and never uploaded.
GLB to STL Converter
Turn GLB and glTF models, including AI 3D exports, into printable STL. Sized in millimeters, standing upright.
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Converted in your browser. Files are never uploaded.
Continue with your model
See the textures first, make a new model from a photo, or check the STL.
How to convert GLB to STL
- 1
Add a GLB or glTF
Drop a .glb, or a .gltf with its data embedded. Draco-compressed files work too.
- 2
Set the print size
glTF is measured in meters, so check the size on the plate and resize the longest side if needed.
- 3
Download the STL
Get a binary STL standing upright, ready for supports and slicing.
Why use this GLB to STL converter
Built for GLB models made for screens, from AI generators to game engines.
One STL or one per mesh
Keep the whole scene in one STL, or download a ZIP with a separate STL for each mesh.
Size shown before you download
The model sits on a build plate with its width, depth and height in millimeters or inches, plus its triangle count.
Batch convert
Add several GLB files at once and download all the STLs together in one ZIP.
What changes when GLB becomes STL
GLB is built for screens: it carries textures, lighting materials and animation. A printer only needs the surface.
Kept
- Every mesh in the scene, with its position
- Real size, converted from meters to millimeters
- Up direction, turned from Y-up to Z-up
- Draco and meshopt compressed geometry
Left behind
- Textures, base colors and PBR materials
- Animations, bones and morph targets
- Cameras and lights
- Vertex colors
GLB to STL questions
Answers about AI models, size, textures, .gltf files and cost.
Can I 3D print a GLB from an AI 3D generator?
Yes. Convert it here, then check it in your slicer. AI models can have thin parts or small holes, so the GLB viewer's watertight check is worth a look first.
Why is my converted model so large?
glTF stores sizes in meters, and the converter writes millimeters. A model authored at 1.8 units becomes 1800 mm. Turn on Resize longest side to print it at the size you want.
Does the STL keep my textures?
No. STL has no color or texture support. To print in color, paint the model in Bambu Studio or PrusaSlicer, or keep the GLB for screens.
My .gltf file will not open. Why?
Some .gltf files keep their geometry in separate .bin and image files. Export the model as a single .glb, which bundles everything, and convert that.
Is the GLB to STL converter free?
Yes. It runs in your browser with no sign-up and no limit, and your model is never uploaded.