Compression Streams API

Baseline 2023
Newly available

Since May 2023, this feature works across the latest devices and browser versions. This feature might not work in older devices or browsers.

Note: This feature is available in Web Workers.

The Compression Streams API provides a JavaScript API for compressing and decompressing streams of data using the gzip or deflate formats.

Built in compression means that JavaScript applications will not need to include a compression library, which makes the download size of the application smaller.

Interfaces

CompressionStream

Compresses a stream of data.

DecompressionStream

Decompresses a stream of data.

Examples

In this example a stream is compressed using gzip compression.

js
const compressedReadableStream = inputReadableStream.pipeThrough(
  new CompressionStream("gzip"),
);

In the following example a function decompresses a blob using gzip.

js
async function DecompressBlob(blob) {
  const ds = new DecompressionStream("gzip");
  const decompressedStream = blob.stream().pipeThrough(ds);
  return await new Response(decompressedStream).blob();
}

Specifications

Specification
Compression
# compression-stream

Browser compatibility

BCD tables only load in the browser