A free online CSS border radius generator. Control each corner independently with sliders, toggle between px and % units, and preview the result live. Includes presets for circles, pills, cards, and rounded shapes.
Adjust sliders for each corner (top-left, top-right, bottom-right, bottom-left).
Toggle between px and % units.
Preview the border radius live.
Copy the CSS code.
border-radius rounds the corners of an element. It accepts 1-4 values for each corner. For example, border-radius: 10px 20px 30px 40px sets top-left, top-right, bottom-right, and bottom-left respectively.
Set border-radius: 50% on a square element (equal width and height). This creates a perfect circle.
Free online tool — works in your browser, no sign-up required. Start using it right now.
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Every tool works in your browser — no sign-up, no data collection.