# Convert a ReadableStream to a Uint8Array (/docs/guides/streams/to-typedarray)

<!-- agent-signals: reading_time_min: 1 · est_tokens: 213 · updated: 2026-07-28 -->
Related: [Convert a ReadableStream to a string](/docs/guides/streams/to-string.md), [Convert a ReadableStream to JSON](/docs/guides/streams/to-json.md), [Convert a ReadableStream to a Blob](/docs/guides/streams/to-blob.md), [Convert a ReadableStream to a Buffer](/docs/guides/streams/to-buffer.md), [Convert a ReadableStream to an ArrayBuffer](/docs/guides/streams/to-arraybuffer.md), [Convert a ReadableStream to an array of chunks](/docs/guides/streams/to-array.md)

To convert a [`ReadableStream`](https://developer.mozilla.org/en-US/docs/Web/API/ReadableStream) to a `Uint8Array`, read its contents into an [`ArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer) with `Bun.readableStreamToArrayBuffer`, then create a [`Uint8Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array) that points to the buffer.

```ts
const stream = new ReadableStream();
const buf = await Bun.readableStreamToArrayBuffer(stream);
const uint8 = new Uint8Array(buf);
```

`Bun.readableStreamToBytes` converts to a `Uint8Array` directly.

```ts
const stream = new ReadableStream();
const uint8 = await Bun.readableStreamToBytes(stream);
```

***

See [Bun's other `ReadableStream` conversion functions](/runtime/utils#bun-readablestreamto).