From a scanned surface to a modeling workflow
Move a PLY surface mesh into an OBJ-compatible editor. Convert triangles and convex quads, retain authored normals and supported texture coordinates, and confirm the scale of your scan. Vertex colors and texture images are omitted; point clouds require surface reconstruction first.
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Max 100 MB · processed locally
Your model stays on this device. Parsing, conversion, verification, and download preparation run locally in this browser.
The input must already have surface faces. ASCII, binary little-endian and binary big-endian PLY 1.0 meshes are accepted. Triangles are retained and planar convex quads become two triangles. A point cloud or Gaussian splat file has samples rather than connected surfaces, so this converter asks you to reconstruct a mesh elsewhere before upload. The resulting OBJ contains mesh geometry, normals and supported UVs without colors or an MTL library.
Triangle indices become OBJ faces. Convex planar quads are triangulated consistently. Larger, concave or nonplanar polygons must be triangulated in the source editor; no point-cloud surface is invented.
Complete nx/ny/nz normals are retained and transformed with the model; missing normals are calculated. Vertex u/v, s/t or texture_u/texture_v pairs are supported. Face texcoord lists take precedence so face-corner texture seams survive triangulation.
RGB and alpha values, confidence scores and custom scanner properties are omitted. The previews use neutral geometry shading. A TextureFile comment does not trigger an image request; UV coordinates alone do not recreate the colored scan.
Step 1
Choose an ASCII or binary .ply file up to 100 MB. Inspect the mesh and triangle count; reconstruct point clouds before using this converter.
Step 2
PLY has no standard unit or up axis. Confirm the source unit and guessed up direction, then choose the OBJ coordinates. Keep the single mesh as one named object; merge and split are disabled because no separate parts are detected.
Step 3
Convert and inspect the output rebuilt from the actual OBJ bytes. Check dimensions before downloading, and reassign any external image textures in your editor.
Bring a PLY mesh from a scanning or reconstruction workflow into a polygon editor that accepts OBJ for cleanup, sculpting or simplification.
Carry common vertex or face-corner UV coordinates into OBJ for later material assignment. Reattach image textures yourself; the image files are not copied.
Confirm the source coordinate unit, convert numeric scale and choose the up direction before handing the mesh to an OBJ-based processing tool.
PLY stores typed element and property tables, commonly used for scanned vertices, surface faces and color attributes. OBJ stores textual vertex, normal, UV and face records for modeling tools. This conversion maps a supported PLY surface into that mesh representation. It cannot turn an unconnected point set into a surface, and it deliberately omits nonstandard OBJ color extensions.
| Property | PLY | OBJ |
|---|---|---|
| Surface | Vertices with triangle or quad indices | Triangle faces; no surface reconstruction |
| Normals | Optional nx/ny/nz properties | Authored normals or calculated fallback |
| Texture coordinates | Common vertex pairs or face texcoord lists | Supported UVs as vt records |
| Scan appearance | RGB, alpha and possible image references | No colors, images or MTL in this export |
| Coordinates | No standard unit or up direction | Confirmed numeric scale and orientation |
| Extra attributes | Confidence, labels and scanner properties | Custom properties omitted |
PLY to OBJ loses scan colors, transparency, custom scanner attributes and texture images. Supported normals and UVs survive, but no MTL file is generated. Both formats are unitless; confirm the source unit and import using the selected output unit.
No. They need a separate surface reconstruction step to create face indices. This tool converts existing meshes, not unconnected points or splat primitives.
Yes. PLY 1.0 ASCII and both little-endian and big-endian binary meshes are accepted when they contain supported triangle or convex quad faces.
Complete nx/ny/nz vertex normals are retained; missing normals are calculated. Vertex u/v, s/t and texture_u/texture_v pairs and face texcoord lists are supported. Face-corner UVs take precedence; custom UV schemas are omitted.
Standard PLY is read as one mesh. Custom object labels and disconnected shells are not separate imported objects, so there are no detected parts to merge or split.
Confirm the intended source coordinate unit before converting. Choose the desired output unit, inspect the verified dimensions and use the same unit in your OBJ importer. Neither file records a standard physical unit.
No. PLY image references are ignored and all parsing, preview, conversion and verification run in your browser. Assign companion images separately in the destination editor.
Use PLY to STL for a slicer workflow that only needs triangle facets. OBJ is useful when you want to carry supported normals and UV coordinates into a modeling application.
