This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The TextDecoder.prototype.decode() method returns a DOMString containing the text, given in parameters, decoded with the specific method for that TextDecoder object.


b1 = decoder.decode(buffer, options);
b2 = decoder.decode(buffer);
b3 = decoder.decode();


buffer Optional
Is either an ArrayBuffer or an ArrayBufferView containing the text to decode.
options Optional
Is a TextDecodeOptions dictionary with the property:
A Boolean flag indicating that additional data will follow in subsequent calls to decode(). Set to true if processing the data in chunks, and false for the final chunk or if the data is not chunked. It defaults to false.


This example encodes and decodes the euro symbol, ā‚¬.


<p>Encoded value: <span id="encoded-value"></span></p>
<p>Decoded value: <span id="decoded-value"></span></p>


const encoder = new TextEncoder();
const array = encoder.encode('ā‚¬'); // Uint8Array(3) [226, 130, 172]
document.getElementById('encoded-value').textContent = array;

const decoder = new TextDecoder();
const str = decoder.decode(array); // String "ā‚¬"
document.getElementById('decoded-value').textContent = str;



Specification Status Comment
The definition of 'TextDecoder.decode()' in that specification.
Living Standard Initial definition.

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
decodeChrome Full support 38Edge ? Firefox Full support 19
Full support 19
Partial support 18
Notes Implemented a slightly different version of the spec.
IE No support NoOpera Full support 25Safari Full support 10.1WebView Android Full support 38Chrome Android Full support 38Firefox Android Full support 19
Full support 19
Partial support 18
Notes Implemented a slightly different version of the spec.
Opera Android Full support YesSafari iOS Full support 10.3Samsung Internet Android Full support 3.0


Full support Ā 
Full support
No support Ā 
No support
Compatibility unknown Ā 
Compatibility unknown
See implementation notes.
See implementation notes.

See also