W3cubDocs

/Web APIs

Blob: stream() method

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since ⁨April 2021⁩.

Note: This feature is available in Web Workers.

The stream() method of the Blob interface returns a ReadableStream which upon reading returns the data contained within the Blob.

Syntax

stream()

Parameters

None.

Return value

A ReadableStream which, upon reading, returns the contents of the Blob.

Usage notes

With stream() and the returned ReadableStream, you gain several interesting capabilities:

  • Call getReader() on the returned stream to get an object to use to read the data from the blob using methods such as the ReadableStreamDefaultReader interface's read() method.
  • Call the returned stream's pipeTo() method to pipe the blob's data to a writable stream.
  • Call the returned stream's tee() method to tee the readable stream. This returns an array containing two new ReadableStream objects, each of which returns the contents of the Blob.
  • Call the returned stream's pipeThrough() method to pipe the stream through a TransformStream or any other readable and writable pair.

Specifications

Specification
File API>
# dom-blob-stream>

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Opera Safari Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet WebView Android WebView on iOS
stream 76 79 69 63 14.1 76 79 54 14.5 12.0 76 14.5

See also

© 2005–2025 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/Blob/stream