What is a GLB file?
GLB is the single-file binary form of glTF 2.0, the Khronos standard often described as the JPEG of 3D. One file holds geometry, materials, textures, animations and the scene graph, which makes it the default choice for web viewers, game engines and AR.
At a glance
- Full name
- Binary glTF 2.0
- Extensions
- .glb
- Type
- 3D model
- Introduced
- 2017
- Created by
- Khronos Group
- Compression
- Both
- MIME type
- model/gltf-binary
Strengths
- Everything in one file: meshes, PBR materials, textures, animation
- Designed for fast runtime loading, not for editing
- Native support in browsers, game engines and AR viewers
Limitations
- Not an editing format; round-tripping through it loses authoring data
- Not accepted by 3D printing slicers
When to use GLB
Showing a 3D model on the web, in a game engine, or in AR.
Printing the model (use STL) or continuing to author it in a DCC tool (use its native format).
Convert GLB files
Every tool below runs in your browser unless it is labelled otherwise, so the file stays on your device.
GLB to STL Converter
Pulls mesh geometry out of GLB or glTF files and exports clean, printable STL, handy for slicing software and 3D printers.
GLB to OBJ Converter
Extracts mesh geometry from GLB or glTF files and exports it as Wavefront OBJ for editing in older desktop 3D modeling tools.
STL to GLB Converter
Converts STL 3D models to GLB (glTF binary) entirely in your browser, no upload or account needed, ready for web viewers, Unity, or Godot.
OBJ to GLB Converter
Turns Wavefront OBJ meshes into GLB (glTF binary), the format most web viewers, Unity, Godot, and AR tools expect by default.
FBX to GLB Converter
Converts Autodesk FBX files, animation included, into GLB for three.js scenes, Unity and Godot projects, and AR pipelines.
GLB compared
Related 3d model formats
Last updated 2026-08-03