GrandpaCADTools
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Open STL, OBJ, PLY, GLB, glTF, 3MF, FBX, STEP, IGES, and 3DM files right in your browser: rotate, zoom, and check dimensions, volume, and watertightness. Nothing is uploaded.
Drop a file and it renders instantly: drag to rotate, scroll to zoom, right-drag to pan, and toggle wireframe in the corner to see the triangle structure. Files that carry materials and colors, GLB and glTF, 3MF, 3DM, STEP and IGES, and colored PLY scans, render with them; the textures button switches back to the plain mesh. The panel below the viewer reports exact dimensions, volume, surface area, triangle count, and whether the mesh is watertight. Drop another file onto the viewer at any time to swap the model without reloading the page.
It reads all the common 3D formats: STL and 3MF from the printing world, OBJ and PLY from sculpting and scanning, GLB and glTF from the web, and STEP and 3DM straight from CAD.
GrandpaCAD turns a text prompt into a ready-to-print 3D model. Functional parts, organic shapes, multi-color prints. No CAD skills needed.
"Phone stand with cable slot, 70mm wide, 15 degree angle"
