> ## Documentation Index
> Fetch the complete documentation index at: https://bun-1dd33a4e-farm-ad2450b3-transpiler-cache-version-namespa.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Convert a ReadableStream to an ArrayBuffer

`Bun.readableStreamToArrayBuffer` reads the contents of a [`ReadableStream`](https://developer.mozilla.org/en-US/docs/Web/API/ReadableStream) into an `ArrayBuffer`.

```ts theme={"theme":{"light":"github-light","dark":"dracula"}}
const stream = new ReadableStream();
const buf = await Bun.readableStreamToArrayBuffer(stream);
```

***

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