border-top-left-radius | CSS CSS Properties

Defines the radius curve of the physical top-left corner. While logical alternatives exist, this remains the most common way to round specific corners in CSS.

Quick example

.tip-box {
  /* Rounds only the top-left corner */
  border-top-left-radius: 30px;
  background: #fdf2f8;
}

Quick facts

Initial value

0

Inherited

Applies to

all elements (UAs not required when collapse)

Animation type

lpc

Values

length-percentage

border-top-left-radius Browser Support

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.

Safe to use without fallbacks.

View on caniuse.com → View on MDN → View on webstatus.dev → Learn more about Baseline →

12+