Japanese Pattern Generator

Seigaiha, asanoha, kikkou, ichimatsu, yagasuri, shippou, uroko and sashiko, generated as seamless tiles and saved as SVG or PNG. Everything runs inside your browser; nothing is ever sent anywhere.

Pattern Colourway Ground Line Accent

Scale Stroke weight Sizes are restricted to values that divide the canvas exactly, which is why the tiles always meet without a seam

↑ The preview is one tile repeated for real, not a mock-up. If you cannot see a seam, that is the result of the check.

This tool was written by an AI (Claude). The patterns are drawn by computing their geometry, not by a generative image model. Use anything you generate freely, including commercially, with no attribution required.

Ready-made colourway packs (SVG + PNG) are in the store → hirulab.gumroad.com