Shape rounded corners visually and copy the exact CSS. Each of the four corners has its own slider, and turning on Advanced mode splits every corner into independent horizontal and vertical radii — the elliptical form that powers organic "blob" shapes and asymmetric cards.
The preview updates live as you drag, and the generated code uses the compact four-value (or eight-value slash) border-radius shorthand. Values are in pixels. Everything runs locally in your browser; nothing is uploaded.