Drop a glTF file, check the preview, download OBJ. The conversion runs in your browser, so your model never leaves your device.
Files are processed entirely in your browser. Nothing is uploaded to a server.
Any 3D edit is just a prompt away.
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glTF is a JSON scene format for web and real-time 3D. A .gltf file often references separate buffer and texture files, while GLB packs everything into one binary.
The converter writes a plain OBJ that imports cleanly into Blender, Maya, and most game engines, which makes it a practical handoff format for further editing.
One thing to watch: glTF stores coordinates in meters, while OBJ is usually read as millimeters. If your model arrives 1000 times too small, tick the meters-to-millimeters option before converting.
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"
