OFF Object File Format MIME Type
model/x-off represents, how to open it, and how Poly supports this 3D format. MIME type details for model/x-off
In active use| MIME type | model/x-off |
|---|---|
| Extensions | .off |
| First standardized | 1990s |
| Created by | Geomview community |
| Browser support | |
| Example applications | MeshLab, CGAL tools |
| Poly support | Yes. Poly recognizes valid OFF Object File Format files and makes supported geometry available in the file experience. |
| Indexed by Poly | Yes. Poly indexes filenames and creates visual similarity information for supported 3D content; available metadata is shown in details. |
| Preview in Poly | Yes. Poly previews supported OFF Object File Format geometry. |
| Poly agent | Yes. An optimized rendition of the 3D object or scene is provided to the agent, allowing compact yet information-rich multimodal interaction with 3D files. |
What does model/x-off represent?
The model/x-off media type identifies off object file format files, normally stored as .off. OFF is a compact text format for polygon meshes. Its header identifies the format, followed by counts for vertices, faces, and edges; subsequent records list coordinates and face indices. Variants add conventions for colors or higher-dimensional data, so applications should validate the header.1
Opening and converting the format
MeshLab and CGAL tools can inspect or import this format. Export to GLB when you need a compact scene package. Choose 3MF for additive manufacturing metadata, or use a dedicated slicer for STL preparation.
Support in Poly
Poly previews supported geometry, makes filenames searchable, and provides visual similarity for supported 3D content. Available mesh and scene metadata can appear in details. An optimized rendition of the 3D object or scene is provided to the agent, allowing compact yet information-rich multimodal interaction with 3D files.
| Construct | Handling |
|---|---|
| Geometry | Vertex coordinates and polygon index lists |
| Attributes | Core OFF has no standard materials or texture references |
| Scene features | OFF does not define cameras, lights, rigs, or animation |
Poly's rendition supports inspection and multimodal understanding; retain the original when editing or validating exact topology.
Format context and alternatives
OFF became associated with the Geomview and computational-geometry communities as a simple way to exchange polygonal objects. Its small vocabulary is easy to inspect, but it intentionally carries less scene information than modern asset formats. 1 Choose glTF or GLB for interactive scene delivery, 3MF for manufacturing packages, and use this format when its geometry or point-cloud representation fits the task.
Footnotes
- Princeton Shape Benchmark. Shape and mesh format resources. ↩ ↩2