: Offers conversion between formats like FBX, OBJ, and STL, though results for rigged XPS models may vary. The Pro Method: Blender (Most Reliable)
Entirely free, very simple user interface, and requires no registration.
: XPS models can import either massively large or microscopically small. Always check your scene scale settings and adjust the import/export scale factor (usually set to 0.01 or 100 depending on the target engine). The Desktop Alternative: Blender