JavaScript (ES2026) reference · String Methods

JavaScript String.fromCodePoint() Method

Create a string from Unicode code points, including emoji outside the BMP that fromCharCode() can't express in one number.

JavaScript (ES2026) Since ES2015

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Syntax

String.fromCodePoint(cp1, cp2, /* …, */ cpN)

Parameter	Description
`codePoints`	Numbers between 0 and 0x10FFFF.

A string.

Emoji from code pointsTry it yourself

const s = String.fromCodePoint(0x1F42B, 0x2728);
console.log(s === "\u{1F42B}\u{2728}", s.length, [...s].length);

Output

true 3 2

Invalid code points throwTry it yourself

try {
  String.fromCodePoint(-1);
} catch (e) {
  console.log(e.name);
}

Output

RangeError

Version	Change
JavaScript ES2015	Added

String.fromCharCode() · Create a string from UTF-16 code units, for example String.fromCharCode(72, 105) gives "Hi".
string.codePointAt() · Return the full Unicode code point at an index, correctly handling emoji and other characters outside the BMP.
JavaScript Strings · tutorial
JavaScript String Methods · tutorial