Obloid
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3D Model Splitter — STL, OBJ & 3MF

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Split for printing

Cut & connect

Model
Cut plane

Pick a straight XY, XZ, or YZ cut, or add tilt for an angled cut. Connectors work on tilted planes too.

Connectors

Dowel pegs are built into the bottom half and mate with holes in the top half. Threaded studs print separately and screw the halves together. 0.2 mm clearance suits most printers.

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Parts export print-ready: the peg half prints pegs-up in its own orientation, everything else lays cut-face down. The ZIP holds one STL per part; the 3MF opens with all parts placed.

How to split a model for 3D printing

  • Everything runs in your browser with the Manifold geometry engine compiled to WebAssembly. Your file is never uploaded — there is no server, no account, and no wait in a queue. Models with open edges are welded shut automatically on import.
  • With dowel pegs the cut exports as a male and a female half: the pegs are part of the bottom piece and print pointing up, the holes hide in the top piece, and the parts press together with glue. No loose pins to lose.
  • Threaded studs print separately and screw both halves together, so the model can come apart again. The coarse printable thread has 0.2 mm of clearance built in.
  • Tilted cuts hide the seam better than straight ones on organic shapes: run the plane along a natural crease or color change and the joint almost disappears.
  • For models bigger than two printable parts, run the tool more than once: split, download, then split one of the halves again.

More free tools: Nameplate, Text to 3D, Spinning Top, Wall Planter, or the tools hub.