Trace a raster image to SVG

PNG, JPEG or WebP. The file is decoded to raw pixels first, so the input format only matters for how it gets read in, not for how the trace itself works.

detailed and curvy are imagetracerjs own named presets; posterized maps onto imagetracerjs posterized2 preset specifically, which blurs slightly before quantizing colours, closer to what most people mean by a posterized trace than a flat two colour one.

colors sets the palette size traced shapes are quantised onto; pathomit drops any traced shape smaller than that many pixels, filtering out speckle; cornerThreshold controls how tightly lines and curves are fit, with a lower number keeping sharper corners. Leaving any of them blank uses the chosen presets own default for that setting.

No. Colours are posterized to a palette as part of the trace, and the result is a set of filled vector paths with no stored link back to the source pixels, so the conversion only runs one way.

It refuses with a message naming the file, since a blank or fully transparent image produces an SVG with no path elements at all, which is treated as a failed trace rather than a valid empty result.