CSS3 Rounded Corners

Browser Support

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	9.0	5.0 4.0 -webkit-	4.0 3.0 -moz-	5.0 3.1 -webkit-	10.5

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CSS3 border-radius Property

With CSS3, you can give any element "rounded corners", by using the border-radius property.

#rcorners1 {
    border-radius: 25px;
    background: #8AC007;
    padding: 20px; 
    width: 200px;
    height: 150px; 
}

#rcorners2 {
    border-radius: 25px;
    border: 2px solid #8AC007;
    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; 
}

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

#rcorners4 {
    border-radius: 15px 50px 30px 5px;
    background: #8AC007;
    padding: 20px; 
    width: 200px;
    height: 150px; 
}

#rcorners5 {
    border-radius: 15px 50px 30px;
    background: #8AC007;
    padding: 20px; 
    width: 200px;
    height: 150px; 
}

#rcorners6 {
    border-radius: 15px 50px;
    background: #8AC007;
    padding: 20px; 
    width: 200px;
    height: 150px; 
}

You could also create elliptical corners:

#rcorners7 {
    border-radius: 50px/15px;
    background: #8AC007;
    padding: 20px; 
    width: 200px;
    height: 150px; 
}

#rcorners8 {
    border-radius: 15px/50px;
    background: #8AC007;
    padding: 20px; 
    width: 200px;
    height: 150px; 
}

#rcorners9 {
    border-radius: 50%;
    background: #8AC007;
    padding: 20px; 
    width: 200px;
    height: 150px;
}

CSS3 Rounded Corners Properties

Property	Description
border-radius	A shorthand property for setting all the four border-*-*-radius properties
border-top-left-radius	Defines the shape of the border of the top-left corner
border-top-right-radius	Defines the shape of the border of the top-right corner
border-bottom-right-radius	Defines the shape of the border of the bottom-right corner
border-bottom-left-radius	Defines the shape of the border of the bottom-left corner