Convert STP to OBJ
Convert a STP file to OBJ in your browser. Free, no upload, no sign-up.
Convert STP files to OBJ directly in your browser. The converter reads the exact STP geometry with the OpenCascade CAD kernel running in WebAssembly, tessellates it at the quality you choose and writes a OBJ file. Nothing is uploaded, there is no file size limit beyond your computer's memory, and the result downloads instantly. OBJ keeps groups and UV coordinates and opens in every modelling tool, which makes it a good format for editing or texturing a model.
How to convert STP to OBJ
- 1Drop your STP file
Drag a .stp file onto the box above or click to choose one. Tessellated in the browser with OpenCascade. Mesh density is adjustable; the first load downloads a 7 MB engine.
- 2Pick the mesh quality
Fine gives smoother curves and a larger file, coarse keeps large assemblies light. The default suits most 3D printing jobs.
- 3Check the preview
The model renders in 3D so you can confirm it loaded correctly. Dimensions, volume and triangle count are shown next to it; open edges are flagged if the mesh is not watertight.
- 4Download the OBJ
Adjust the export options if needed and click download. A .mtl material file is not generated; the exported OBJ contains geometry, normals and UVs only.
What is a STP file?
.stp is simply the three-letter extension for a STEP file (ISO 10303-21). SolidWorks, Inventor and many Windows CAD tools default to .stp while others use .step; the content is identical. It stores exact B-rep solids with units, not triangles.
Commonly used by: SolidWorks, Inventor, Creo, NX, supplier CAD downloads
Tessellated in the browser with OpenCascade. Mesh density is adjustable; the first load downloads a 7 MB engine.
What is a OBJ file?
OBJ is a plain-text mesh format from Wavefront. It stores vertices, normals, UV texture coordinates and face definitions, and references materials through a companion .mtl file. It is human-readable and supported by virtually every 3D modelling application.
Commonly used by: Blender, Maya, ZBrush, game engines, photogrammetry tools
OBJ keeps groups and UV coordinates and opens in every modelling tool, which makes it a good format for editing or texturing a model.
STP vs OBJ
| STP | OBJ | |
|---|---|---|
| Full name | STEP file (.stp extension) | Wavefront OBJ |
| Encoding | Text | Text |
| Geometry type | Exact (B-rep / curves) | Triangle mesh |
| Colors | Yes | No |
| Textures | No | Yes |
| Materials | No | Yes |
| Stores units | Yes | No |
| Multiple objects | Yes | Yes |
| Typical use | SolidWorks, Inventor, Creo | Blender, Maya, ZBrush |