3mf to glb conversion is probably related to export of 3d models or meshes from 3D Manufacturing format (.3mf) to GL Transmission Format (.glb). You can actually find several dedicated glTF (GL Transmission) exporter or converter tools that are probably your best choice for such conversion. But in case you also want to do edits to the model, it might be best to use one of the 3D modeling software that supports import of 3MF format.
Updated: October 9, 2023