What is GLB?

glTF stores a model as a JSON description plus separate files for binary data and textures. GLB wraps all of that into one binary container. That makes it easy to upload, download and share: one file, nothing to lose.

What a GLB can contain

• Meshes (vertices, normals, UVs, vertex colours)
• PBR materials using the metallic-roughness model
• Embedded textures (PNG, JPEG, and WebP or KTX2 through extensions)
• Scene hierarchy, cameras, skins for rigged models, and animations

What opens GLB files

Blender, Godot, three.js, Babylon.js, Windows 3D Viewer, Android's Scene Viewer and most modern game engines (Unity through a glTF package). On the web, Google's <model-viewer> displays one with a single HTML tag. That's how every model in our library is shown.

When to choose GLB

Use GLB for the web, real-time engines, AR on Android, and as a general exchange format. For iPhone AR you also need USDZ. For 3D printing you want STL or 3MF, because printers ignore materials.