If you don't want to install heavy software, online browser-based converters are a quick alternative. Quick, one-off conversions without software installation.
The most reliable way to convert XPS files is through dedicated add-ons for professional software or lightweight specialized tools. Xnalara to MMD Converter by mariokart64n on DeviantArt xps 3d model converter free
Let us summarize your decision matrix:
Blender does not support XPS out of the box, but thanks to a dedicated modding community, powerful free add-ons exist. Historically, scripts like for Blender have been the gold standard. These scripts allow users to import .xps or .mesh files directly into Blender. Once imported, the model exists within Blender’s ecosystem and can be exported to virtually any other format—FBX for Unity/Unreal, DAE for other engines, or OBJ for static meshes. If you don't want to install heavy software,
The search for a "free XPS 3D model converter" is ultimately a search for accessibility. While dedicated standalone converters exist, they have largely been superseded by the robust, free ecosystem of Blender and its community-developed import scripts. These tools democratize 3D design, allowing hobbyists and students to experiment with high-quality character models without financial barriers. However, users must be prepared to navigate the technical challenges of texture linking and rigging issues, and they must do so with a respect for the copyright laws that govern the models themselves. In the end, the best converter is not a simple program, but rather the skill to use the free tools at one's disposal effectively. Xnalara to MMD Converter by mariokart64n on DeviantArt
If you don't need a skeleton and just want the 3D "shell" (the mesh), MeshLab is a powerful, lightweight alternative.