Show a 3D print design on the web or in AR. STL cannot be displayed by most web viewers; GLB can. This converter runs entirely in your browser: the file is processed on your own device and never uploaded.
Why convert STL to GLB?
Show a 3D print design on the web or in AR. STL cannot be displayed by most web viewers; GLB can.
How it works
Drop your .stl file above and download the .glb. The conversion engine (Assimp, compiled to WebAssembly) runs inside the page, so it works the same on Windows, macOS, Linux and ChromeOS without installing anything.
STL vs GLB
STL (stereolithography): STL, introduced in 1987 for 3D Systems’ stereolithography machines, describes a surface only as a list of triangles. It carries no colour, no materials and no units. Used by: Every 3D-printing slicer — Cura, PrusaSlicer, Bambu Studio, Chitubox — and model sites like Printables and Thingiverse.
GLB (binary glTF): GLB is glTF packed into one binary file: scene description, geometry and textures together. That single self-contained file is why the web and AR use it. Used by: <model-viewer>, three.js, Android Scene Viewer, Shopify 3D product models, Blender and game engines.
Quality notes
STL has only triangles — no colour, no UVs — so the GLB has the exact geometry with a default material. The file often gets smaller, because GLB stores shared vertices once.
Common use cases
Previewing prints on a shop page; showing designs on a portfolio; AR previews of printed products on Android.
Frequently asked questions
Will the GLB have colour?＋
STL carries no colour, so the model gets a neutral default material you can change in any 3D editor.
Is the geometry changed?＋
No. The triangles are copied as-is.
Can people view it on their phone?＋
Yes. GLB opens in Android Scene Viewer and in any page using <model-viewer>.
Do I need an account?＋
No, and the file is never uploaded.