What is a dieline?
A dieline is the flat, unfolded template that shows exactly where a printed package or product is cut, creased and glued. It's the blueprint a die-maker turns into a steel cutting tool — so if the dieline is wrong, every box in the run is wrong. Here's how to read one and set it up cleanly.
What the lines actually mean
A dieline isn't artwork — it's a set of instructions, each line a different operation. The conventions are near-universal:
- Cut lines — solid lines, where the blade cuts all the way through.
- Crease / fold lines — dashed lines, where the board is scored so it folds without cracking.
- Perforation — dotted lines, partial cuts for tear-off sections.
- Glue / bleed areas — often shaded, showing where adhesive goes and where artwork must extend.
The folded 3D package only exists once these operations happen in the right places. On screen it's a flat, slightly puzzling outline.
Dieline vs bleed — not the same thing
People conflate them, but they solve different problems. The dieline is the cut/fold path; bleed is the colour you extend past the cut so no white shows after trimming. A package needs both — the dieline defines the shape, and your artwork must bleed past every cut edge of that shape. If you're shaky on bleed, start with our bleed guide.
Keep the dieline on its own layer
Set cut and crease lines as named spot colours (e.g. 'Cut', 'Crease') on a separate, non-printing layer set to overprint. That way the die-maker can isolate them and they never print as visible lines on the finished box.
Setting up artwork around a dieline
- Place the supplied dieline on a locked top layer so you can see the cuts and folds while you design.
- Build artwork on layers below it, extending colour past every cut line by the required bleed (usually 3 mm).
- Keep critical text and logos well inside fold lines — type that lands on a crease will look broken on the folded package.
- Before export, hide or set the dieline layer to non-printing (or confirm with your printer how they want it delivered).
Watch ink coverage on packaging too — large solid panels of rich colour can exceed press limits; our TAC guide explains the danger, and the ink coverage checker flags it.
Where dielines come from
For standard formats — straight-tuck cartons, mailers, folders — the printer or die-maker usually supplies a dieline to their tooling. For simple rectangular pieces with basic folds, you can generate a clean cut-and-bleed template yourself with the Bleed & Dieline Generator. For complex structural packaging, always start from the manufacturer's die — never guess fold positions, because the steel rule die is unforgiving.
Frequently asked questions
What's the difference between a cut line and a crease line?
A cut line (solid) is where the blade cuts through the material. A crease or fold line (dashed) is where the board is scored so it bends cleanly without cracking. Mixing them up means the package either won't fold or falls apart.
Should the dieline print on the final package?
No. The dieline is a guide for the die-maker and cutter, not artwork. Put it on a separate spot-colour layer set to overprint, and confirm with your printer whether to leave it in the file or remove it before output.
Do I still need bleed if I have a dieline?
Yes. The dieline defines the cut path; bleed is the colour extended past that path so no white edge shows after cutting. Extend artwork past every cut line by the bleed amount, typically 3 mm.
Can I make my own dieline?
For simple rectangular pieces with basic folds, yes. For structural cartons and complex packaging, use the die-maker's template — fold and cut positions must match the physical steel die exactly, and small errors ruin the whole run.
Respect the steel die
For anything structural, the die-maker's template wins — fold and cut positions have to match the physical tool exactly. We never guess a dieline, and neither should you. Reviewed June 14, 2026.