TextEncoder

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since January 2020.

Note: This feature is available in Web Workers.

The TextEncoder interface enables you to encode a JavaScript string using UTF-8.

Constructor

TextEncoder(): Creates and returns a new TextEncoder.

Instance properties

The TextEncoder interface doesn't inherit any properties.

TextEncoder.encoding Read only: Always returns utf-8.

Instance methods

The TextEncoder interface doesn't inherit any methods.

TextEncoder.encode(): Takes a string as input, and returns a Uint8Array containing the string encoded using UTF-8.
TextEncoder.encodeInto(): Takes a string to encode and a destination Uint8Array to put the resulting UTF-8 encoded text into, and returns an object indicating the progress of the encoding. This is potentially more performant than the older encode() method.

Examples

Encoding to UTF-8

This example shows how to encode the "€" character to UTF-8.

html

<button id="encode">Encode</button>
<button id="reset">Reset</button>
<div id="output"></div>

div {
  margin: 1rem 0;
}

const utf8encoder = new TextEncoder();
const text = "€";

const output = document.querySelector("#output");
const encodeButton = document.querySelector("#encode");
encodeButton.addEventListener("click", () => {
  output.textContent = utf8encoder.encode(text);
});

const resetButton = document.querySelector("#reset");
resetButton.addEventListener("click", () => {
  window.location.reload();
});

Specifications

Specification
Encoding # interface-textencoder