Web/API/Blob/arrayBuffer

The arrayBuffer() method in the Blob interface returns a Promise that resolves with the contents of the blob as binary data contained in an ArrayBuffer.

Syntax

var bufferPromise = blob.arrayBuffer();

blob.arrayBuffer().then(buffer => /* process the ArrayBuffer */);

var buffer = await blob.arrayBuffer();

Parameters

None.

Returns

A promise that resolves with an ArrayBuffer that contains the blob's data in binary form.

Exceptions

While this method doesn't throw exceptions, it may reject the promise. This can happen, for example, if the reader used to fetch the blob's data throws an exception. Any exceptions thrown while getting the data will be converted into rejections.

Usage notes

While similar to the FileReader.readAsArrayBuffer() method, arrayBuffer() returns a promise rather than being an event-based API, as is the case with the FileReader interface's method.

Specifications

Specification	Status	Comment
File APIThe definition of 'Blob.arrayBuffer()' in that specification.	Working Draft

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`arrayBuffer()`	Chrome Full support 76	Edge Full support 79	Firefox Full support 69	IE No support No	Opera No support No	Safari No support No	WebView Android Full support 76	Chrome Android Full support 76	Firefox Android No support No	Opera Android Full support 54	Safari iOS No support No	Samsung Internet Android Full support 12.0

Legend

Full support: Full support
No support: No support