String.fromCodePoint()

String.fromCodePoint(...codePoints)

Returns: String · Updated March 13, 2026 · String Methods

javascript string unicode code-point

String.fromCodePoint() is a static method that returns a string built from one or more Unicode code points. Unlike the older String.fromCharCode(), it correctly handles code points above U+FFFF (supplementary characters such as emoji and rare scripts).

Syntax

String.fromCodePoint(num1)
String.fromCodePoint(num1, num2)
String.fromCodePoint(num1, num2, /* …, */ numN)

Parameters

Parameter	Type	Default	Description
…codePoints	Number	required	One or more Unicode code points (integers between 0 and 0x10FFFF).

Return Value

A string formed by the characters corresponding to the specified code points. Throws a RangeError if any code point is not a valid Unicode value (e.g. negative or > 0x10FFFF).

Examples

Basic ASCII characters

String.fromCodePoint(65, 66, 67);
// 'ABC'

String.fromCodePoint(9731, 9733, 9842);
// '☃★♲'

Emoji (above U+FFFF)

String.fromCodePoint(0x1F600);
// '😀'

String.fromCodePoint(0x1F4A9);
// '💩'

String.fromCodePoint(128512);
// '😀'  (128512 === 0x1F600)

Multiple code points

String.fromCodePoint(72, 101, 108, 108, 111);
// 'Hello'

Invalid code point throws RangeError

String.fromCodePoint(-1);
// RangeError: Invalid code point -1

String.fromCodePoint(0x110000);
// RangeError: Invalid code point 1114112

Common Patterns

Encoding emoji by name

const EMOJI = {
  smile:  0x1F600,
  heart:  0x2764,
  thumbUp: 0x1F44D,
};

function emoji(name) {
  return String.fromCodePoint(EMOJI[name]);
}

console.log(emoji('smile'));    // 😀
console.log(emoji('heart'));    // ❤
console.log(emoji('thumbUp')); // 👍

Converting code point array to string

const codePoints = [72, 101, 108, 108, 111, 32, 127758];

const result = String.fromCodePoint(...codePoints);
console.log(result);
// 'Hello 🌎'

Generating a Unicode range

// Generate all uppercase Latin letters
const letters = Array.from({ length: 26 }, (_, i) =>
  String.fromCodePoint(65 + i)
);

console.log(letters.join(',')); // A,B,C,...,Z