CADProps

CADProps is a free online CAD viewer and measurement tool by CadProps Technologies Pte. Ltd., Singapore (no outside funding). Opens STEP, IGES, STL and native formats (SolidWorks, NX, Inventor, CATIA) in the browser. Measure dimensions, volume, surface area, weight; compare models; export CSV. Viewing and measuring need no signup; converting, saving and share links need free login. Completely free. Maker Ethan Tan, CTO.