Learn how to professionally convert STEP files to GLB and then to USDZ format using FreeCAD and Apple Reality Converter. This reliable workflow is perfect for creating high-quality 3D models for Apple Vision Pro, AR Quick Look, interactive product visualization, and modern digital experiences.

Step-by-Step Guide: Convert STEP to GLB and USDZ

Part 1: Convert STEP to GLB Using FreeCAD

Step 1: Open the STEP file

Launch FreeCAD, go to File → Open, select your .stp or .step file in the browser window and click Open to load your CAD model.

Step 2: Select objects to export

In the model tree or 3D viewport, select the objects or the complete assembly you want to export.

Step 3: Export as GLTF/GLB

Go to File → Export, choose glTF (*.gltf) as the format, name your file and click Save.

Note: FreeCAD will generate a .gltf file along with a .bin file. You can use them together or combine them into a single .glb file.

Part 2: Convert GLB to USDZ Using Reality Converter

Step 1: Launch Reality Converter

On your Mac, press Command + Space, type “Reality Converter” and launch the application.
If you don’t have it installed, download it here: Reality Converter Beta

Go to File → Import and select the .glb or .gltf file you exported from FreeCAD.

Step 2: Review and Export to USDZ

Carefully preview the 3D model to check geometry, scale, materials, and textures. When ready, go to File → Export, select USDZ format and save the file.

The final .usdz file is now fully optimized and ready for Apple Vision Pro, AR Quick Look, and professional AR/VR applications.