The best way to convert a USDZ 3D model is using specialized 3D tools or online platforms that support USDZ input and your target format (e.g., glTF, OBJ, STL).
These tools preserve critical data like textures, animations, and metadata—generic converters often lose this, which matters for web deployment (glTF), 3D editing (OBJ), or printing (STL).
For beginners, try free options: Blender (with the USDZ import/export add-on) for offline use, or online tools like Convertio for quick tasks—just confirm your target format is supported first.