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Drop a GLB 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.
GLB is the binary form of glTF, the standard format for web and real-time 3D. A single file holds meshes, materials, and textures.
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.
glTF stores coordinates in meters, while OBJ is read as millimeters, so the converter multiplies every coordinate by 1000 and the part keeps its real size. If it arrives 1000 times too large, the file was saved in millimeters anyway: tick the 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.
"Model a snap-fit clip that holds a phone charging cable on a desk edge up to 25 mm thick."
