TextEncoder

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.

<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

Browser compatibility

See also

• The TextDecoder interface describing the inverse operation.