What happens when STEP is converted to OBJ?
The precise CAD surfaces stored in the STEP file are tessellated into polygons that can be written to an OBJ mesh. The original parametric features and exact CAD surfaces are not preserved.
CAD & 3D
STEP to OBJ Converter
Convert STEP and STP CAD files to OBJ online. Create a widely supported polygon mesh locally in your browser without uploading your CAD data.
Tool
STEP to OBJ Converter
Convert STEP and STP CAD files to OBJ online. Create a widely supported polygon mesh locally in your browser without uploading your CAD data.
This tool runs in your browser. Your input is processed locally and is not uploaded.
About this Tool
Use this free online STEP to OBJ Converter to transform precise STEP or STP CAD models into widely supported OBJ mesh files. Load the CAD model, preview its geometry, choose the tessellation quality, preserve separate parts where possible, and download the converted OBJ file. OBJ is useful for 3D modeling, visualization, rendering, game engines, and mesh-based editing. Conversion runs directly in your browser, so your CAD file does not need to be uploaded.
Examples
- cube.step
- rounded-part.stp
Frequently Asked Questions
Can I convert both STEP and STP files?
Yes. STEP and STP are commonly used extensions for the same standardized CAD exchange format.
Can separate STEP parts remain separate?
When the source model contains identifiable parts, bodies, or assembly components, the converter can preserve them as separate OBJ objects or groups where possible.
Can STEP colors be preserved?
This converter exports OBJ geometry and groups. Companion MTL color export is not included in this browser tool.
Does OBJ preserve exact CAD geometry?
No. OBJ stores polygonal mesh geometry rather than precise curves, surfaces, constraints, or parametric modeling features.
How should I choose the mesh quality?
Choose higher quality for curved or detailed models where geometric accuracy matters. Choose lower quality for smaller files and faster loading in visualization or real-time applications.
Is my STEP file uploaded?
No. The CAD model is processed and converted locally in your browser.
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