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CSS border-top-left-radius Property

The border-top-left-radius property sets the rounding of the top-left corner of the element.

Note: The radius applies to the whole background, even if the element has no border.

CSS Demo: border-top-left-radius

border-top-left-radius: 65px;
border-top-left-radius: 50%;
border-top-left-radius: 250px 100px;
border-top-left-radius: 30% 100px;
This is a box with a top left rounded corner

Technical Details

Default value 0
Applies to all elements
Inherited no
Computed value as specified (length or percentage)
Animatable yes See animatable properties. Demo
Version CSS3
JavaScript syntax object.style.borderTopLeftRadius = "12px" Demo

CSS Syntax:

border-top-left-radius: length|initial|inherit;


The following example shows how to use border-top-left-radius property:

Run code

Note: If you set two values, the first one is for the top border, and the second one for the left border. If the second value is omitted, it is copied from the first. If either length is zero, the corner is square, not rounded.

Browser compatibility

The numbers in the table specify the first browser version that fully supports the border-top-left-radius property:

border-top-left-radius 5
4 -webkit-
3 -moz-
10.5 5
3.1 -webkit-

Property Values

The following table describes the values of border-top-left-radius property:

Value Description
length Defines the shape of the top-left corner See length units
initial Sets this property to its default value
inherit Inherits this property from its parent element

See also

CSS Rounded Corners tutorial

CSS border-radius property

CSS border-bottom-left-radius property

CSS border-bottom-right-radius property