Design pen-plotter art in the browser with spirographs, L-systems, flow fields and handwriting, then export G-code

A vector drawing app for pen plotters with shapes, Bézier pen, freehand, text, handwriting and generative patterns like spirograph, Voronoi and Truchet tiles. Effects such as roughen, wave and sketch overdraw feed a toolpath preview and G-code export.

Notes

Niche: most useful if you own a plotter, though the drawing and preview work without one. Maker says in the HN post that agentic AI tools turned a small app into a much bigger one; the page doesn't name a tool.