Blob: arrayBuffer() method

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

Syntax

js
arrayBuffer()

Parameters

None.

Return value

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
File API
# dom-blob-arraybuffer

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobileserver
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
Deno
Node.js
arrayBuffer()

Legend

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Full support
Full support
Has more compatibility info.

See also