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How a browser tool converts PNG images into vector cut files for Cricut and lasers

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A developer built Cutline, a browser-based tool that converts PNG and JPG images into cut files compatible with Cricut, Silhouette, Glowforge, and vinyl plotters. The tool works by tracing pixel edges and converting them into closed vector paths that cutting machines can follow. It uses a modified k-means algorithm on a color histogram rather than individual pixels, reducing processing time regardless of image size, while ensuring consistent color palette results. Cleanup steps remove dust specks and fill pinholes, and layers are stacked with slight overlaps to prevent gaps during physical cutting. During development, the author discovered a bug caused by anti-aliased edge pixels being misassigned to a third color cluster, creating thin unwanted holes in cut layers.

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