How to convert CATPART to OBJ
- Add your .CATPART file - drop it in the box above or click to browse.
- Convert it to .OBJ in a few seconds.
- Download your new .OBJ file.
What to expect
- Curved surfaces are approximated as triangles during tessellation - increase the mesh quality setting in the exporter to reduce visible faceting on fillets and cylinders.
- The parametric feature tree (sketches, pads, pockets, fillets) does not transfer; you receive only the final polygon shape.
- For editable geometry when moving between CAD systems, export to STEP rather than OBJ.
Frequently asked questions
Do I need a CATIA license to convert?
No - CAD Assistant and Autodesk Fusion 360 (free tier) both open
.catpart files without a CATIA license.Will colors and materials carry over?
Possibly - CAD Assistant exports an accompanying
.mtl file when appearance data is assigned in CATIA, but verify the result in your destination application.The OBJ looks faceted - how do I fix it?
Increase the tessellation quality in the export dialog; a higher setting produces more triangles and smoother curves at the cost of a larger file.
Can I convert OBJ back to a CATPart?
No - OBJ stores only a polygon mesh with no parametric data, so the conversion is one-way; use STEP if you need editable geometry.
Programs that convert CATPART: PolyTrans|CAD+DCC · 3ds Max (3D Studio Max) · TransMagic · Autodesk Fusion 360 · Online CAD converter · Babel3D
