STL to GLB Converter
Convert 3D models from STL to GLB (glTF binary) instantly, right in your browser. Perfect for Blender, three.js, Godot, Unity, and AR/VR pipelines.
STL is the standard export from 3D scanners, CAD software, and slicers, but it carries geometry only - no materials, no scene hierarchy, nothing a web viewer or game engine can render out of the box. This converter parses ASCII or binary STL with three.js and packages it as a single binary GLB with a default neutral material, ready to drop into three.js, Babylon.js, Unity, Godot, or an AR Quick Look scene. The free tier handles files up to 25 MB, five per day; if you need the mesh lighter for web delivery afterward, run it through the 3D Web & AR Optimizer next.
Loading tool
How it works
- 01
Drop or select your STL file (from a 3D scan, CAD export, or slicer).
- 02
Click Convert - the mesh is parsed and re-exported as binary glTF.
- 03
Download your GLB file, ready for three.js, Unity, Godot, or AR.
Details
- Category
- 3D models
- Runs
- In your browser
- Files uploaded
- No
- Cost per run
- Free
- Sign-in
- Not required
- Works offline
- Yes, once loaded
Last updated 2026-08-03
Common questions
Is this really free?
Yes - the free tier converts files up to 25 MB, 5 per day. Pro removes limits.
Do my files get uploaded?
No. The conversion runs entirely in your browser using three.js. Nothing is sent to any server.
Which STL formats are supported?
Both ASCII and binary STL files are supported.
Does the GLB include colors or textures?
STL is a geometry-only format, so the GLB gets a default neutral material. You can retexture it in Blender or your engine of choice.