Free OFF (.off) to OBJ (.obj) converter — running entirely in your browser. No upload, no signup, no file limits: your files never leave your device.
STEP · IGES · BREP · STL · OBJ · PLY · GLB · glTF · 3MF · COLLADA · AMF · FBX · 3DS · OFF · LAS · PCD · XYZ · PTS
OFF is a minimal academic mesh format: a vertex list and a face list in plain text, nothing else. Its simplicity makes it a favorite in computational-geometry research, mesh-processing courses and tools like CGAL and MeshLab.
OBJ is a plain-text mesh format from the world of computer graphics. It stores vertices, normals, texture coordinates and polygon faces, and nearly every 3D application — Blender, Maya, 3ds Max, game engines, renderers — can read and write it, making it a dependable lowest common denominator for mesh exchange.
| OFF | OBJ | |
|---|---|---|
| Geometry | Polygon mesh | Polygon mesh |
| Units | No | No |
| Colors & materials | Optional vertex colors | Via MTL sidecar |
| Animations | No | No |
| Typical use | Research & geometry processing | DCC tool interchange |
Yes — free with no accounts, no watermarks and no file-size limits. Conversion runs on your own machine, so there are no server costs behind it.
No. The converter runs entirely in your browser using WebAssembly. Your .off file never leaves your device, which makes it safe for confidential designs.
Yes — parts and assembly hierarchy are preserved where OBJ supports them, and you can optionally merge everything into a single mesh during conversion.
Yes. Every converted model opens in the built-in 3D viewer with an assembly tree, display modes and section views, so you can inspect the result first.
OFF vertex colors are not carried through the converter’s flat per-part color model, and the format supplies no reliable units. The OBJ result is a single geometry file with no generated MTL sidecar, so it does not carry textures or material definitions.