STP to OBJ conversion is useful when a CAD model needs to become a Wavefront mesh for modeling or cleanup. This tool reads the STP file locally in your browser, tessellates CAD geometry into triangles, and writes an OBJ file you can preview before downloading. Your files never touch our servers.
How to convert STP to OBJ online
- Upload a .stp or .step file from your computer.
- Click Convert to read the CAD geometry in your browser.
- Let the tool tessellate CAD faces into OBJ mesh triangles.
- Preview the mesh.
- Download the .obj file and check it in your modeling app.
STP is the shorter extension for STEP, so this converter accepts either extension. The output is a mesh, which is useful for polygon tools but different from an editable CAD model.
What changes when STP becomes OBJ
STP can describe exact CAD solids and surfaces. OBJ describes vertices and faces. This conversion turns the CAD shape into triangle geometry so mesh tools can open it.
The OBJ output does not preserve editable CAD features, constraints, exact curves, assembly structure, colors, or material metadata. If you want an STL for a slicer, use STP to STL. If you need the STEP spelling for search or sharing, use STEP to OBJ.