Fancy Border Radius is a small, free in-browser tool by 9elements (a German web studio) for designing the squishy, blob-like shapes that became popular in the 2020s. Drag eight handles to set the horizontal and vertical radii on each corner independently, and copy the resulting border-radius: a% b% c% d% / e% f% g% h%; snippet straight into your CSS.

The tool's permalink encodes the current shape in the URL hash so you can share a blob design with a teammate. Open-source on GitHub and free to use.