Free dieline checker · Nothing uploaded
Dieline to 3D in one drop.
Open a supplier’s DXF or SVG dieline, see every cut and crease in its own colour, catch open outlines and doubled lines before the die is made, and watch it fold.
- DXF & SVG
- Layer mapping
- Folding preview
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Designing is free. Free mockups carry a watermark, and dielines and print files are part of Pro.
No payment needed to start.
How it works
From a supplier’s file
to a box you can see.
The checker runs the 3D studio’s own dieline importer, so what passes here imports there.
- 01
Drop the file
A DXF or SVG straight from your supplier or CAD. It is read in your browser and never uploaded.
- 02
Map the layers
Knife, crease, perforation and glue are matched from layer names and colours. Fix any that are wrong in one click.
- 03
Read the checks
Open outlines, gaps, doubled lines and unit mistakes are flagged, with the blank size and knife length measured.
- 04
Fold it in 3D
See it fold here, then import it in the studio to set every angle, add artwork and export print-ready files.
Before you send it to the die maker
What a clean
dieline looks like.
Most die and fold problems are visible in the file. These are the ones the checker looks for.
One closed knife outline
The cut line should run all the way round the blank and meet itself. Open ends and gaps of a fraction of a millimetre stop the panels from being found.
Creases on their own layer
Put creases on a separate layer or colour from the knife (dashed or blue is conventional), and perforations on a third. Mixed layers are the most common mapping problem.
Real units
Export in millimetres or inches. SVGs without units are read at 96 px per inch; if the blank comes out the size of a stamp or a car park, change the unit.
Just the die lines
Leave dimensions, bleed, notes and artwork off, or on clearly named layers (they are ignored by name). One structure per file: the press sheet is laid out later.
No doubled lines
Two lines on top of each other can cut twice or leave a sliver panel. The importer merges hairline doubles and reports them so you can clean the source.
No outlined text or shapes
Filled shapes and text outlines on the die layer read as extra cuts. Keep type and logos on artwork layers.
Good to know
Questions,
answered.
Checking and folding supplier dielines in the browser.
Which files can I check?
ASCII DXF (R12 and later, as most CAD and die-making software exports it) and SVG from Illustrator, Inkscape or a CAD export. Lines, polylines, arcs, circles and Béziers are read; text, dimensions and images are skipped. Binary DXF and PDF dielines aren’t supported: export a DXF or SVG copy.
How does it know which lines are cuts and which are creases?
From the layer names first (CUT, CREASE, PERF, our own export layers and many common variants), then colours and dash patterns: red or magenta strokes read as the knife, dashed, blue or green strokes as creases, and helper layers such as bleed, dimensions and artwork are ignored. You can change any layer’s line type, and the check reruns at once.
What does it check?
That the knife outline is closed, loose ends and doubled lines (the importer welds tiny gaps and merges hairline slivers, and tells you), that the creases split the blank into panels connected by folds, and that the file’s unit gives a believable size. It also measures the blank, the knife and crease rule length, and counts panels, folds and pieces.
Why does the folded preview look wrong?
Creases start at 90°, reverse creases at −90° and double creases at 180°. Real cartons fold some flaps further or not at all: crash-lock bottoms and roll-over sides are the usual examples. In the 3D studio you set each fold’s angle, pick the base panel and see the closed box.
Is my dieline uploaded?
No. The file is read and analysed in your browser with the same importer the studio uses. Nothing is sent to a server, which matters for supplier dielines under NDA.
Can I put artwork on an imported dieline?
Yes. Import the same file in the 3D studio and it becomes a structure like any built-in one: add artwork to every panel, check it in 3D, render mockups and export a print PDF with your die lines on their own layers.
Next: artwork on every panel
Their dieline, your design, in 3D.
Import the file in the studio, set the fold angles, add artwork to every face and export a print PDF with the die lines on their own layers.