DecompressionStream

Baseline Widely available *

This feature is well established and works across many devices and browser versions. It’s been available across browsers since May 2023.

* Some parts of this feature may have varying levels of support.

Note: This feature is available in Web Workers.

The DecompressionStream interface of the Compression Streams API decompresses a stream of data. It implements the same shape as a TransformStream, allowing it to be used in ReadableStream.pipeThrough() and similar methods.

Constructor

Creates a new DecompressionStream

Returns the ReadableStream instance controlled by this object.

Returns the WritableStream instance controlled by this object.

In this example a blob is decompressed using gzip compression.

js
const ds = new DecompressionStream("gzip");
const decompressedStream = blob.stream().pipeThrough(ds);

Specification

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This page was last modified on Nov 26, 2025 by MDN contributors.