Sticker Cut-File Maker
Give it a transparent PNG and it builds the white keyline by dilating the alpha channel, then traces that outline into an SVG the cutter can follow. The cut path is the shape of your artwork, not a rectangle drawn around it.
Load a transparent PNG to see the keyline and cut path.
Output
- Sticker
- 76 mm
- Keyline
- 2.5 mm
- With bleed
- 85.0 mm square
- Pixels at 300 DPI
- 1004 × 1004 px
- A4 sheet
- 2 × 3 = 6 up
How the cut file is produced
The keyline is not a rectangle painted behind the image. Every pixel gets its exact distance to the nearest opaque pixel of your artwork, using a Euclidean distance transform, and anything within the border width is filled. That gives an even offset around a paw, a wing or a signature alike, which a blur or a repeated three-by-three dilate cannot do — those bulge at corners and pinch at thin features.
The outline of that dilated shape is then traced with marching squares and simplified, and those points become the path in the SVG. So the cut line is derived from the same geometry you see on screen rather than being drawn separately and hoped to line up.
One detail worth knowing about, because it silently ruins traced paths: a closed contour begins and ends on the same vertex. Feed that straight into a Ramer-Douglas-Peucker simplifier and the first baseline has zero length, every perpendicular distance measures as zero, nothing exceeds the tolerance, and the entire loop collapses to two coincident points — an empty file that still opens without error. Here each loop is split at its farthest vertex and the two open halves are simplified separately.
Sizes are millimetres throughout. A 76 mm sticker with a 2.5 mm keyline and 2 mm bleed is an 83 mm square file, and the pixel figure shown is what you actually get at the chosen resolution.
Questions
Does this generate artwork from a text description?
No, and the page no longer suggests it does. It is a cut-file and keyline tool: you supply the artwork, it produces the border, the print file and the cut path. Drawing an illustration from a prompt needs an image model, which is a different job.
Why does my JPEG give a square cut line?
Because a JPEG has no alpha channel, so every pixel is opaque and the outline of the artwork is the edge of the rectangle. Export your design as a PNG with the background deleted and the trace has something to follow.
What is the difference between die cut and kiss cut here?
Die cut exports the traced contour, so the blade follows your shape. Kiss cut exports the bounding shape with a corner radius, because a kiss cut only scores the vinyl and leaves the backing sheet intact. They are genuinely different files, not the same rectangle with a different name.
How much bleed and border should I use?
Cutters have tolerance, usually a few tenths of a millimetre but sometimes more on a roll. A 2 to 3 mm keyline is the usual sticker look and also gives the blade somewhere safe to wander; 2 mm of bleed beyond that means a small registration drift still leaves no bare edge.
The trace is following the drop shadow. Can I stop that?
Raise the alpha threshold. Soft shadows are partially transparent, so a higher threshold treats them as background and the contour tightens onto the solid artwork.
Is anything uploaded?
No. Decoding, tracing and export all happen in your browser.