Free online 3D file compressor
Shrink a GLB or glTF: weld duplicate vertices, optionally reduce polygons, and re-pack to a compact binary GLB — smaller downloads for web, AR and games. No sign-up, no watermark.
Everything runs in your browser — your file is never uploaded.Drop a GLB / glTF file
or click to choose one from your device
Original
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Optimized
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Saved
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Triangles
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Private by design
Optimization runs on-device with WebGL — nothing is uploaded, so confidential models stay yours.
Weld & re-pack
Duplicate vertices are merged and the model is re-packed as a compact single-file binary GLB.
Dial in the size
Optionally reduce the polygon count from 0–90% — great for web, AR and mobile budgets.
Check the result
See the before/after size and triangle count, then download only if you like the trade-off.
Build models worth optimizing
Grafy turns a photo, a few images, or a prompt into a textured 3D model you can rig, animate, remesh, print-prep and export — all on one visual canvas.