Border Radius Generator
Create custom border-radius values with asymmetric rounded corners and live preview.
border-radius: 0px;border-top-left-radius: 0px;
border-top-right-radius: 0px;
border-bottom-right-radius: 0px;
border-bottom-left-radius: 0px;rounded-0Understanding Border Radius
Border radius rounds element corners. You can use one value for all corners, or different values for each. The property accepts pixels, percentages, or even elliptical values for asymmetric curves.
This generator lets you adjust each corner independently and see the result before copying the CSS. Toggle uniform mode when you want all corners the same.
Border Radius Syntax
Single value (all corners)
border-radius: 8px;Applies 8px radius to all four corners.
Four values (clockwise from top-left)
border-radius: 10px 20px 10px 20px;Top-left, top-right, bottom-right, bottom-left.
Elliptical corners
border-radius: 10px / 20px;Different horizontal and vertical radii for oval corners.
Common Questions
What value makes a perfect circle?
For a square element, use border-radius: 50% or any value ≥ half the element's width. For rectangles, elliptical values create pill shapes.
Can I animate border radius?
Yes, border-radius is animatable. Transitions work smoothly between different values. Performance is good on modern browsers.
Why do my rounded corners look jagged?
This is usually an anti-aliasing issue. Try adding a 1px transparent border or usingoutline: 1px solid transparent to smooth edges.
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