Drop
Export a GLB from SketchUp (File › Export › 3D Model › GLTF Binary) and drag it in. Textures travel inside the file, so there is nothing else to gather.
BLVIZ Mesh Utility
Export a GLB from SketchUp (File › Export › 3D Model › GLTF Binary) and drag it in. Textures travel inside the file, so there is nothing else to gather.
Pick a reduction ratio or an absolute triangle budget. Quadric error decimation keeps the silhouette while folding away detail.
Compare original and optimized side by side, then export a GLB that opens back in SketchUp, Blender or a web viewer with the same textures — or strip it to OBJ or STL.
Cut a heavy scan or store asset down to a realtime budget, prepare far-LOD stand-ins for archviz scenes, or lighten props before a WebGL or AR export. Below ~10% keep an eye on fine details — thin features are the first to collapse.