Dial in the perfect corner radius and preview it live on real UI shapes — pixel-precise, every time.
Drag a single slider and watch the corner radius update instantly on a real, scalable UI shape. Stack two shapes and judge subtle radius differences the way your eyes actually will. Read exact pt, px, and continuous-curvature numbers — copy them straight into your design tool. Tune fill, stroke, and shadow so the preview mirrors the surface your component will live on. Everything stays on your device. No accounts, no ads, no tracking — ever.
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