JavaScript String toUpperCase() method

Definition and usage

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

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

See also:

toLowerCase() method

toLocaleLowerCase() method

toLocaleUpperCase() method

Example

Convert to uppercase:

let text = "Hello World!";
let result = text.toUpperCase();

Try it yourself

Syntax

string.toUpperCase()

Parameter

No parameters.

Return value

Type Description
String Convert to uppercase string.

Browser support

toUpperCase() Is ECMAScript1 (ES1) feature.

All browsers fully support ES1 (JavaScript 1997):

Chrome IE Edge Firefox Safari Opera
Chrome IE Edge Firefox Safari Opera
Supported Supported Supported Supported Supported Supported

Related pages

JavaScript String

JavaScript String Methods

JavaScript String Search