Open
Upload glTF files to view or edit them like GLB.
- Home
- File formats
- glTF
The glTF File Format
glTF is the Khronos open standard for delivering 3D scenes and models, often called the JPEG of 3D.
.gltfglTF 2.0 (GL Transmission Format)
What is a glTF file?
A .gltf file is JSON describing the scene, meshes, PBR materials and animations. Geometry and textures either sit beside it as .bin and image files, or are embedded inside it as data.
It is designed for efficient loading at runtime rather than for editing, which is why most web 3D viewers and engines read it natively.
When to use glTF
Good for
- Web and real-time pipelines
- Inspecting or scripting scene data as text
Not ideal for
- Sharing as one file (use GLB)
- Exact CAD geometry (use STEP)
How to open, edit and create glTF files online
Export
Export any saved model as glTF from Studio.
glTF compared with other 3D formats
| Format | Geometry | Units | Materials | Animation | Best for |
|---|---|---|---|---|---|
| STEP / STP | Exact solids (B-rep) | Stored | Colours only | No | CAD exchange, manufacturing |
| STL | Triangles | Not stored | No | No | 3D printing |
| GLB | Triangles + scene | Metres | PBR + textures inside | Yes | Web, AR, games |
| glTF | Triangles + scene | Metres | PBR, textures beside | Yes | Web pipelines |
| FBX | Triangles + scene | Stored | Yes | Yes | Game engines, DCC tools |
glTF file questions
Should I use .gltf or .glb?
Use GLB to share one self-contained file. Use .gltf when you want readable JSON or separate texture files.
Can VIZON export glTF?
Yes. Saved models export as glTF from Studio.
Open your glTF file in VIZON
Upload it to your library and open it in the browser, on any computer.