Free OBJ (.obj) to PLY (.ply) 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
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.
PLY was designed at Stanford for storing 3D-scanned data. Beyond plain geometry it can attach arbitrary per-vertex properties — most importantly vertex colors — which makes it the format of choice for 3D scans, photogrammetry output and point-cloud-derived meshes.
| OBJ | PLY | |
|---|---|---|
| Geometry | Polygon mesh | Triangle mesh / scan data |
| Units | No | No |
| Colors & materials | Via MTL sidecar | Per-vertex colors |
| Animations | No | No |
| Typical use | DCC tool interchange | 3D scans & photogrammetry |
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 .obj file never leaves your device, which makes it safe for confidential designs.
Yes — parts and assembly hierarchy are preserved where PLY 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.
The OBJ importer reads the geometry file alone; an external .mtl sidecar and its texture files are not resolved, so that material detail is absent before export. The PLY result has no declared units and does not carry textures, animation or an assembly tree.