Updated June 2026 · runs 100% in your browser
STL to GLB
Convert STL models to GLB (binary glTF) on your device. No upload, no sign-up, no limits.
Drop STL files here
or click to choose
🔒 Processed on your device · 0 bytes uploaded
Loads the 3D engine (~1 MB) on first use — cached after that.
How it works
Drop STL files and download GLB models.
It all runs in your browser with a local copy of three.js — your model never leaves your device, and it stays free, unlimited and private.
About STL to GLB
GLB is the modern, web-friendly 3D format used by viewers, AR and game engines. This packs your STL mesh into a single .glb file.
Frequently asked questions
How do I use STL to GLB?
Drop STL files and download GLB models.
What is GLB?
GLB is the binary form of glTF — one self-contained file that loads fast in web and AR viewers.
Is my file uploaded?
No. It is converted on your device with a local copy of three.js; nothing is uploaded.
What is an STL file?
STL is the standard 3D-printing format. It describes a model's surface as a mesh of triangles but stores no color or texture, which is why it's used mainly for printing rather than rendering.
What is a GLB file?
GLB is the binary form of glTF — a single self-contained file holding 3D geometry, materials, and textures. It's the modern standard for sharing 3D models on the web and in AR.