.glb

What is a .glb file?

GLB is the binary version of glTF — a single file containing 3D model, textures, and animations, preferred for web 3D and AR/VR.

Safe format
Type Cad
By Khronos Group
MIME model/gltf-binary

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What is it

You're working with 3D content for the web, AR, or a product configurator. The file is a GLB — the binary version of glTF that packs the 3D model, textures, and animations into a single self-contained file. Drop it into a web page and it renders. No external dependencies, no missing textures.

GLB is essentially a glTF file (which can reference external images and buffers) bundled into one binary blob. This makes it dramatically easier to share, embed, and deploy. It's the preferred format for web 3D experiences (three.js, Babylon.js), AR platforms (Apple Quick Look, Google Scene Viewer), and e-commerce product viewers. Facebook, Google, and Microsoft all back the format through the Khronos Group.

Any modern browser can display GLB via three.js or model-viewer (Google's web component — one HTML tag). Blender (free) imports and exports GLB natively. Windows 3D Viewer displays them. For the web, GLB is the right format — think of it as the JPG of 3D: good enough quality, universally compatible, easy to serve.

Technical details
Full Name
GL Transmission Format Binary
MIME Type
model/gltf-binary
Developer
Khronos Group
Magic Bytes
67 6C 54 46
Safety
.glb is a known, safe format.
What opens it
Any modern browser (via three.js)
FREE Web
Blender
FREE All
FAQ
What's the difference between GLB and glTF?
Same format, different packaging. glTF is JSON-based and can reference external files (textures, buffers). GLB packs everything into a single binary file. GLB is easier to share and deploy; glTF is easier to inspect and edit.
How do I view a GLB file in my browser?
Use Google's model-viewer web component — add one script tag and one HTML element. Or drag the file into the online glTF viewer at gltf-viewer.donmccurdy.com. No plugins required.
Related formats