Kept
- Triangle geometry of each solid
- One group per part, with its colour
- Millimetre dimensions as authored
Runs locally · no upload
Convert STEP to OBJ
Turn a STEP solid into an OBJ mesh for rendering or editing. Each solid becomes a group, so you can still isolate parts in Blender or Maya.
- Free preview
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- 5 credits per file
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Drop a 3D file hereSTL, OBJ, PLY, GLB, glTF, 3MF or STEP · up to 100 MB · processed locallyYour file never leaves this browser.
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What changes in the conversion
Dropped
- Exact B-Rep surfaces
- Parametric history and constraints
- PMI annotations
Common mistakes
- A STEP without solids has no mesh to export.
- Assemblies over 100 MB are refused; split them first.
- Invalid files are rejected by the tessellator.
For 3D printing
- OBJ is not a print format: convert to STL or 3MF for the slicer.
- Groups help you hide interior parts before exporting a print mesh.
Drop the file — it is read locally, never uploaded.
Choose the options, then convert or compress.
Download the result and open it in your slicer or 3D software.
Frequently asked questions
Does STEP to OBJ keep colours?+
The tessellator assigns a colour per solid and OBJ groups keep it; MTL materials are not written.
Can I edit the mesh in Blender?+
Yes, OBJ is a common import format; expect a triangle mesh without parametric history.
Why do curves look faceted?+
STEP is exact CAD; OBJ is a mesh. Curves are approximated by triangles during tessellation.
Need a model instead of a conversion?
Turn a photo, a drawing or a logo into a 3D model, then export it in the format you need.