FILE FORMAT GUIDE
GLB File (.GLB): Binary glTF & Opening a Model
A GLB file is the binary container form of glTF. It can package scene information and asset data together. Import it through a glTF-aware application rather than renaming it to a text document.
Check supported header evidence locally. Identification is not file validation or a malware scan.
Analyze a file locallyQuick facts
- Extension
- .glb
- Format
- Binary glTF
- Category
- 3d
- MIME type
- model/gltf-binary
- Standard / developer
- Khronos Group
- Open with
- Blender
What is GLB?
GLB has a header followed by typed chunks. The JSON chunk describes the asset. External resources remain possible, so a GLB extension alone does not prove the asset is self-contained.
- Share a model as a single-file Blender export
How to open GLB
This workflow is documented for Blender 4.5. Format support is not a guarantee that every extension or material imports identically.
BlenderDesktop application
Use File > Import > glTF 2.0 (.glb, .gltf) and select the GLB. If the menu is absent, enable the glTF 2.0 add-on in Preferences. Inspect the imported scene and material nodes.
Technical details
- Signature
- 67 6C 54 46 (offset 0)
- Encoding
- Little-endian binary container with a JSON chunk
- Container
- GLB
- Compression
- Not reviewed
Things to check
- Imported material nodes approximate glTF materials; inspect the result before re-exporting.
- Required extensions need support in the consuming implementation.
Related formats
- glTF JSON Asset
The JSON representation of the same asset format, with different resource packaging.
Sources & review
Fact review: 2026-09-18. Unknown fields are not inferred from the file extension.