Convert STEP to USDZ
Convert a STEP file to USDZ in your browser. Free, no upload, no sign-up.
Convert STEP files to USDZ directly in your browser. The converter reads the exact STEP geometry with the OpenCascade CAD kernel running in WebAssembly, tessellates it at the quality you choose and writes a USDZ file. Nothing is uploaded, there is no file size limit beyond your computer's memory, and the result downloads instantly. USDZ lets iPhone and iPad users view the model in augmented reality directly from Safari, with no app required.
How to convert STEP to USDZ
- 1Drop your STEP file
Drag a .step file onto the box above or click to choose one. The exact geometry is tessellated into triangles in your browser using OpenCascade (the same kernel FreeCAD uses). You can control the mesh density before exporting. Large assemblies may take a while; the first load downloads a 7 MB engine.
- 2Pick the mesh quality
Fine gives smoother curves and a larger file, coarse keeps large assemblies light. The default suits most 3D printing jobs.
- 3Check the preview
The model renders in 3D so you can confirm it loaded correctly. Dimensions, volume and triangle count are shown next to it; open edges are flagged if the mesh is not watertight.
- 4Download the USDZ
Adjust the export options if needed and click download. Geometry and basic materials are exported. Meshes without materials get a neutral gray so AR Quick Look renders them.
What is a STEP file?
STEP (ISO 10303, files ending in .step or .stp) is the neutral CAD exchange format. Unlike mesh formats it stores exact B-rep geometry: analytic surfaces, NURBS, edges and assembly structure with real units. Every CAD system can export STEP, and it is what you receive from suppliers, McMaster-Carr or GrabCAD.
Commonly used by: SolidWorks, Fusion 360, Onshape, FreeCAD, CATIA, Siemens NX, machine shops
The exact geometry is tessellated into triangles in your browser using OpenCascade (the same kernel FreeCAD uses). You can control the mesh density before exporting. Large assemblies may take a while; the first load downloads a 7 MB engine.
What is a USDZ file?
USDZ is Apple's packaging of Pixar's Universal Scene Description. It is the format iOS uses for AR Quick Look: open a .usdz link in Safari and the model appears in your room through the camera. It stores meshes, PBR materials and textures in a single uncompressed ZIP.
Commonly used by: Apple AR Quick Look, iPhone and iPad, Reality Composer, Pixar USD pipelines
USDZ lets iPhone and iPad users view the model in augmented reality directly from Safari, with no app required.
STEP vs USDZ
| STEP | USDZ | |
|---|---|---|
| Full name | Standard for the Exchange of Product Data (ISO 10303) | Universal Scene Description (zipped) |
| Encoding | Text | ZIP container |
| Geometry type | Exact (B-rep / curves) | Triangle mesh |
| Colors | Yes | Yes |
| Textures | No | Yes |
| Materials | No | Yes |
| Stores units | Yes | Yes |
| Multiple objects | Yes | Yes |
| Typical use | SolidWorks, Fusion 360, Onshape | Apple AR Quick Look, iPhone and iPad, Reality Composer |