This puzzle generator creates interlocking jigsaw-style piece patterns as CNC- and laser-ready SVG, with kerf compensation so the cut pieces actually fit together. It is built for makers cutting custom puzzles, inlays, and interlocking parts on a laser or router.
Interlocking pieces and kerf
The generator lays out a grid of pieces with tabs and blanks (the bumps and sockets) that interlock, and exports clean vector paths. The critical detail for cutting is kerf — the width of material the laser or bit removes. If you cut on the line, every piece ends up slightly smaller and the puzzle is loose; kerf compensation offsets the paths so the finished pieces are the right size and snap together with a satisfying fit.
You can set the number of pieces (the grid), the overall size, and the kerf for your machine and material. Because the output is SVG vector, it scales without loss and drops straight into laser and CNC software.
Cutting a good puzzle
A test cut to dial in the kerf for your exact material and machine is worth doing first — kerf varies with material, thickness, and laser power or bit. Once it is right, the same settings produce repeatable, well-fitting puzzles. Thin plywood, MDF, and acrylic all work well; match the kerf value to whichever you use.
Cutting a puzzle on a laser with a 0.2 mm kerf.
- Without compensation, each cut removes 0.2 mm, so pieces end up ~0.2 mm undersized.
- Set kerf to 0.2 mm so paths are offset outward by half the kerf on each side.
- Pieces now finish at true size and interlock snugly.
Applying the 0.2 mm kerf offset makes the cut pieces fit together correctly.
