What you'll make
A fully parametric finger-joint box — lid, base, and four sides — exported as a flat SVG ready to cut on any laser.
Step 1 — Enter your box dimensions
Type the outer Width, Height and Depth of your box in millimetres. These are the finished external dimensions of the assembled box.
Step 2 — Set material thickness
Enter the exact thickness of your sheet material (e.g. 3 mm for 3mm plywood). This controls the finger-joint tab size — wrong values here cause loose or impossibly tight joints.
Step 3 — Adjust kerf compensation
Enter your laser kerf (usually 0.1–0.2 mm). The tool offsets every joint by half the kerf value so parts snap together cleanly without gaps.
Step 4 — Choose number of fingers
Set the number of finger joints per edge. More fingers = stronger joint but harder to assemble. For most boxes 3–5 fingers per side works well.
Step 5 — Preview and validate
Check the preview panel. Each face of the box is shown laid flat. Confirm tabs and slots align and the layout fits your laser bed.
Step 6 — Export SVG
Click Export. Open the SVG in LightBurn or your laser software. Set the cut lines to a cutting layer and run at the correct power and speed for your material.
Pro tips
Tip 1: Cut a small test joint (5 × 5 cm) first to verify your kerf value before cutting the full box.
Tip 2: Plywood works best — MDF tends to have slightly variable thickness which affects joint tightness.