PLY vs OBJ
PLY is the scanner's format: it stores colour on each vertex and can hold point clouds without faces. OBJ stores meshes with UVs and material references, which is how texture-mapped models are usually exchanged. Turning a coloured scan into OBJ keeps the shape, but per-vertex colour only survives if it's baked into a texture first.
Side by side
| PLY | OBJ | |
|---|---|---|
| Full name | Polygon File Format | Wavefront OBJ |
| Created by | Stanford University | Wavefront Technologies |
| Introduced | 1994 | late 1980s |
| Encoding | binary or ASCII | plain text, with a separate .mtl file |
| File size | compact in binary | large for dense meshes, because it's text |
| Materials | No | Yes |
| Textures | No | No |
| Animation | No | No |
| Colour | per-vertex colour | basic materials in a separate .mtl file |
| Units | unitless | unitless |
| Best for | 3D scans, point clouds and research tools like MeshLab and CloudCompare | older 3D software and CAD-adjacent tools |
Choose PLY when
- •The data is a scan or point cloud.
- •You need per-vertex colour without a texture map.
- •You're processing in MeshLab, CloudCompare or a research tool.
Choose OBJ when
- •You need UV-mapped textures.
- •The destination is a general 3D or rendering app.
- •You want the more widely supported mesh format.
Which apps open them
Of the 15 3D apps in our software guides, 4 open PLY without conversion and 14 open OBJ. Only OBJ opens directly in Unity, Unreal Engine, Godot, Maya, 3ds Max, Roblox Studio, Bambu Studio, OrcaSlicer, PrusaSlicer, UltiMaker Cura.
Questions
- Is PLY better than OBJ?
- Neither is better everywhere. The data is a scan or point cloud: choose PLY. You need UV-mapped textures: choose OBJ.
- Can I convert PLY to OBJ?
- Yes. Our PLY to OBJ converter runs in your browser. The shape and supported materials carry over.
- Which file is smaller, PLY or OBJ?
- PLY: compact in binary. OBJ: large for dense meshes, because it's text. Actual size depends mostly on polygon count and texture resolution.
Written with AI assistance by the Renderlyst team in October 2026. Format support reflects each app's current release as we understand it, and we link the official documentation so you can confirm it for your version. Spotted something out of date? Email alishbakhalid766@gmail.com.