String.prototype.toLowerCase()

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

The toLowerCase() method of String values returns this string converted to lower case.

Try it

Syntax

js
toLowerCase()

Parameters

None.

Return value

A new string representing the calling string converted to lower case.

Description

The toLowerCase() method returns the value of the string converted to lower case. toLowerCase() does not affect the value of the string str itself.

Examples

Using toLowerCase()

js
console.log("ALPHABET".toLowerCase()); // 'alphabet'

Specifications

Specification
ECMAScript Language Specification
# sec-string.prototype.tolowercase

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobileserver
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
Deno
Node.js
toLowerCase

Legend

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Full support
Full support

See also