For those comfortable with the command line, a Python script called xps_tools (found on GitHub) can extract mesh data and convert it to OBJ with material libraries (.MTL).
If you are converting XPS for a web viewer (Three.js, Babylon.js) or AR/VR, export to via Blender. It retains materials, textures, and animations in a single, small file. xps 3d model converter free
Download Blender from blender.org (version 3.6 or newer). For those comfortable with the command line, a