Supported 3D formats
Three separate questions — can we accept it, can we write it back out, and can the browser show it. They have different answers, so they are listed separately.
Universal exchange format with material (.mtl) support.
Geometry-only; ideal for 3D printing and CAD.
Great for scanned data and vertex colors.
Plain-text polygon format common in geometry research.
No browser preview. There is no OFF loader for the viewer, so an OFF asset is processed but not displayed.
Single-file glTF — the default for web and AR.
JSON-based, PBR-ready scene format.
Import only. A .gltf can reference external .bin buffers and image files, and a job result is one stored object — so we read glTF but write GLB.
Not supported
These are the formats we get asked about most. None of them has a parser behind it, so an upload is rejected rather than silently failing later. Convert to OBJ or GLB in your authoring tool first.