CSS3 Rounded Corners Properties

The numbers in the table specify the first browser version that fully supports the property.
Numbers followed by -webkit- or -moz- specify the first version that worked with a prefix.

Property
border-radius	5.0 4.0 -webkit-	12.0	9.0	4.0 3.0 -moz-	5.0 3.1 -webkit-	10.5

CSS3 border-radius Property

With CSS3, you can give any element "rounded corners", by using the
border-radius property.
Here are three examples:
1. Rounded corners for an element with a specified background color:

Rounded corners!

2. Rounded corners for an element with a border:

Rounded corners!

3. Rounded corners for an element with a background image:

Rounded corners!

Here is the code:

Example

#rcorners1 {
    border-radius: 25px;

background: #73AD21;
    padding: 20px;

width: 200px;
    height: 150px;
}

#rcorners2 {

border-radius: 25px;
    border: 2px solid #73AD21;

padding: 20px;
    width: 200px;

height: 150px;
}

#rcorners3 {

border-radius: 25px;
    background: url(paper.gif);

background-position: left top;
    background-repeat:
repeat;
    padding: 20px;
    width:
200px;
    height: 150px;
}

Try it yourself »

	Tip: The `border-radius` property is actually a shorthand property for the `border-top-left-radius`, `border-top-right-radius`, `border-bottom-right-radius` and `border-bottom-left-radius` properties.

CSS3 border-radius - Specify Each Corner

If you specify only one value for the border-radius property, this radius
will be applied to all 4 corners.
However, you can specify each corner separately if you wish. Here are the rules:

Four values: first value applies to top-left, second value applies to top-right,
third value applies to bottom-right, and fourth value applies to bottom-left
corner
Three values: first value applies to top-left, second value applies to top-right and bottom-left,
and third value applies to bottom-right
Two values: first value applies to top-left and bottom-right
corner, and the second value applies to top-right and bottom-left corner
One value: all four corners are rounded equally

Here are three examples:
1. Four values - border-radius: 15px 50px 30px 5px:

2. Three values - border-radius: 15px 50px 30px:

3. Two values - border-radius: 15px 50px:

Here is the code:

Example

#rcorners4 {
    border-radius: 15px 50px 30px 5px;

background: #73AD21;
    padding: 20px;

width: 200px;
    height: 150px;
}

#rcorners5 {

border-radius: 15px 50px 30px;
    background: #73AD21;

padding: 20px;
    width: 200px;

height: 150px;
}

#rcorners6 {

border-radius: 15px 50px;
    background: #73AD21;

padding: 20px;
    width: 200px;

height: 150px;
}

Try it yourself »

You could also create elliptical corners:

Example

#rcorners7 {
    border-radius: 50px/15px;

background: #73AD21;
    padding: 20px;

width: 200px;
    height: 150px;
}

#rcorners8 {

border-radius: 15px/50px;
    background: #73AD21;

padding: 20px;
    width: 200px;

height: 150px;
}

#rcorners9 {

border-radius: 50%;
    background: #73AD21;

padding: 20px;
    width: 200px;

height: 150px;
}

Try it yourself »

Test Yourself with Exercises!

Exercise 1 »
Exercise 2 »