How to convert OBJ to STP
- Add your .OBJ file - drop it in the box above or click to browse.
- Convert it to .STP in a few seconds.
- Download your new .STP file.
What to expect
- The triangle mesh becomes a faceted shell, not a true smooth solid with parametric features.
- Textures and materials are not represented in STEP.
- Dense meshes create large STP files that can be slow to load in CAD software.
Frequently asked questions
Will OBJ to STP give me a clean solid model?
STP (STEP) is designed for boundary-representation solids, but OBJ is a triangle mesh, so the conversion produces a faceted shell that mirrors the mesh - not a smooth parametric solid.
Why convert OBJ to STP?
STEP (ISO 10303) is the most widely accepted neutral CAD format for parts and assemblies, so converting lets OBJ geometry be opened in virtually any CAD program.
What opens an STP file?
STP files open in FreeCAD, CAD Assistant and the Autodesk Viewer and move geometry between CAD systems. The imported shape is faceted rather than editable parametric features.
What is lost in the conversion?
Material, texture and color are not carried into STEP, and because the result is a faceted, mesh-derived shell it is not the clean solid a native CAD model would be. 3D printing still requires converting to STL.
Programs that convert OBJ: SolidWorks · 3D Object Converter · 3ds Max (3D Studio Max) · Autoconverter · TransMagic · CrossManager · Alibre Design Professional · ViaCAD Pro
