Formatguide
The web standard for 3D — compact PBR rendering, native browser support, and universal AR/VR compatibility.
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| Extension | .gltf (JSON + external assets), .glb (binary bundle) |
|---|---|
| Full name | GL Transmission Format |
| Standard | Khronos Group glTF 2.0 |
| Geometry type | Triangle mesh |
| Open standard | Yes |
| Supports PBR materials | Yes — metallic/roughness workflow |
| Supports animations | Yes — skeletal and morph target |
| Supports assemblies | Yes — scene hierarchy |
glTF (GL Transmission Format) is an open standard by the Khronos Group for efficient delivery of 3D scenes to web browsers and real-time apps. It stores mesh geometry, PBR materials, textures, animations and scene hierarchy. GLB is the binary container variant. glTF is called the JPEG of 3D.
glTF is the native format for Three.js, Babylon.js and model-viewer. Shopify, Amazon and Google use glTF/GLB for interactive 3D product visualization.
Apple AR Quick Look (iOS), Google SceneViewer (Android) and WebXR all natively load GLB files.
Unreal Engine, Godot and Babylon.js natively import glTF. It is the preferred format for real-time scenes.
Blender, Sketchfab, Three.js, Babylon.js, Unreal Engine, Godot, Unity (via plugin), iOS AR Quick Look, Android SceneViewer and all modern web 3D renderers.
Commonly converted from STEP or OBJ for web visualization and e-commerce, to FBX for animation toolchains, or to OBJ for legacy renderers.