border-radius

Defines the radius of an element's corners, allowing you to create rounded corners or circular shapes.

It is documented as part of the CSS Backgrounds and Borders specification.

/* Usage Example */
.button {
  border-radius: 8px;
  /* standard rounded corner */
}
.avatar{
  border-radius: 50%;
  /* creates a circle */
}

/* Syntax */
border-radius: length-percentage;

/* Global values */
border-radius: inherit;
border-radius: initial;
border-radius: revert;
border-radius: revert-layer;
border-radius: unset;
Widely available Since 2015 96% global usage

This feature is well established and works across many devices and browser versions. It has been available across browsers since 2015.

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