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String.prototype.toLowerCase()

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

Desktop Mobile Server
Chrome Edge Firefox Opera Safari Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet WebView Android Deno Node.js
toLowerCase 1 12 1 3 1 18 4 10.1 1 1.0 4.4 1.0 0.10.0

See also

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/toLowerCase