Is this STP to OBJ converter free?

Yes — unlimited conversions, no account, no watermark.

Are my files uploaded?

No. The conversion runs 100% locally in your browser. Nothing is sent to any server.

Does the OBJ keep colors or materials?

No — the output is pure geometry (vertices and faces). STEP assembly colors are not transferred.

Can I convert IGES to OBJ here too?

Yes, .iges/.igs files are accepted by the same converter.

STP to OBJ Converter — Free Online

How STP to OBJ conversion works

Drop your STP file (.stp or .step) above.
The OpenCASCADE kernel loads on demand and tessellates the CAD geometry into triangles.
The mesh is serialized as a Wavefront OBJ file — the format Blender, Maya, Unity and three.js all understand.
Preview the result and download the .obj.

Why convert STP to OBJ?

STEP is the CAD industry's exchange format, but game engines, renderers and real-time 3D tools want OBJ — a simple, universal mesh format with vertices and faces. Whether you're bringing a mechanical part into Blender for rendering or into Unity for a product configurator, this tool gets you from precise CAD geometry to a usable OBJ mesh in one step, without installing anything.

About the OBJ output

Plain-text Wavefront OBJ (v vertices + f faces), importable everywhere.
Units are preserved from the source STEP file; scale in your target app if needed.
Need STL instead for 3D printing? Use the STEP to STL converter.

FAQ

Is this STP to OBJ converter free?: Yes — unlimited conversions, no account, no watermark.
Are my files uploaded?: No. The conversion runs 100% locally in your browser. Nothing is sent to any server.
Does the OBJ keep colors or materials?: No — the output is pure geometry (vertices and faces). STEP assembly colors are not transferred.
Can I convert IGES to OBJ here too?: Yes, .iges/.igs files are accepted by the same converter.