skp to svg conversion is used for the purpose of exporting vector graphics from SketchUp file as standard SVG format. This does make sense for various curves and shapes, not so much for 3D model, unless it's related to export of individual faces of the model. You can actually find SketchUp plugins for this, but in case you do not have access to SketchUp completely, you have to rely on some vector graphics editor or 3D modeling tool that supports this functionality.
Updated: August 16, 2023