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JavaScript String toUpperCase() Method

String Object Reference JavaScript String Object

Example

Convert the string to uppercase letters:

var str = "Hello World!";
var res = str.toUpperCase();

The result of res will be:

HELLO WORLD!

Try it yourself »

Definition and Usage

The toUpperCase() method converts a string to uppercase letters.

Note: The toUpperCase() method does not change the original string.

Tip: Use the toLowerCase() method to convert a string to lowercase letters.


Browser Support

Internet Explorer Firefox Opera Google Chrome Safari

The toUpperCase() method is supported in all major browsers.


Syntax

string.toUpperCase()

Parameters

None.

Return Value

Type Description
String The value of a string converted to uppercase

Technical Details

JavaScript Version: 1.0


String Object Reference JavaScript String Object

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