Updated June 2026 · runs 100% in your browser
GLB to STL
Convert GLB (glTF) models to STL on your device. No upload, no sign-up, no limits.
Drop GLB 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 GLB files and download STL 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 GLB to STL
Need to print a model you downloaded as GLB? This flattens it to a printable STL mesh.
Frequently asked questions
How do I use GLB to STL?
Drop GLB files and download STL models.
Is my file uploaded?
No. It is converted on your device with a local copy of three.js; nothing is uploaded.
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.
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.