Test a facade or plan against the classical proportioning systems. Overlay the golden section and spiral, √2/√3/√5 root rectangles, the rule of thirds, a Fibonacci grid, Le Corbusier's Modulor bands, a tatami/ken grid, regulating lines and symmetry axes — on your own image or a draggable, ratio-locked analysis frame — with the ratio read out live.
Runs entirely in your browser — nothing is uploaded. Export the analysis as PNG (image + overlays) or SVG (vector regulating lines).