PNG to DXF Converter

From pixel image to cut-ready DXF polylines — no CAD software needed.

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How PNG to DXF conversion works

DXF is the lingua franca of workshop software: LightBurn, LaserGRBL, Fusion 360, Easel, VCarve and practically every CNC or plasma controller read it. What none of them read is PNG — so the sketch, logo or ornament you have as an image needs its outlines extracted as machine paths first. That is what this converter does: it traces your PNG and writes the outlines as DXF polylines, in the widely-compatible R12 dialect that even old controllers accept.

The output is built for cutting, not for show. Curves are flattened into fine polyline segments (CAD software joins them smoothly), each traced color lands on its own DXF layer so you can assign different operations — cut the black, engrave the red — and near-white background shapes are dropped automatically in the default Silhouette preset, because a machine would otherwise happily cut out your background as a giant rectangle.

Source material matters more for cutting than for screen use. Ideal inputs are high-contrast: black artwork on white, a clean scan of a drawing, a stencil design. Busy photos make poor cutting files no matter the converter. If your PNG has thin lines, keep an eye on the preview — lines thinner than your laser kerf will close up; thicken them in any image editor first.

Scale deserves a sentence: DXF units are dimensionless, and this tool maps one pixel to one unit. Your CAD/laser software will ask on import whether units are mm or inches — check the overall size there and scale once. Every serious workshop program has a one-click “scale to size” for exactly this.

Frequently asked questions

Will the DXF open in LightBurn / Fusion 360 / Easel?

Yes — the output is DXF R12 with plain polylines, the most compatible dialect there is. It avoids splines and other entities that budget controllers choke on.

Why polylines instead of smooth splines?

Compatibility and predictability: every DXF consumer since the 1990s reads polylines, and machines follow them exactly. The segments are fine enough that cuts look smooth.

What do the layer names like C_1A1A1A mean?

Each traced color gets its own layer, named with its hex color. In your laser software you can then assign per-layer operations — e.g. cut one color, engrave another.

What size will the DXF be in mm?

One pixel becomes one DXF unit. Set the physical size after import in your CAD or laser software — a single scale operation, and required only once.

My design has thin lines — any advice?

Lines thinner than about 2–3 pixels may vanish or merge in the trace, and lines thinner than your kerf vanish on the machine. Thicken strokes in an image editor before converting.