# Bun Convert a ReadableStream to a Buffer

> Convert a ReadableStream to a Buffer

- Skill: `jarle/bun-convert-a-readablestream-to-a-buffer` (Agent Skill)
- Install (CLI): `npx skillmds@latest add jarle/bun-convert-a-readablestream-to-a-buffer`
- Raw SKILL.md: https://api.skillmd.com/api/skills/jarle/bun-convert-a-readablestream-to-a-buffer/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: jarle (https://skillmd.com/u/jarle)
- Updated: 2026-09-21
- Page: https://skillmd.com/skills/jarle/bun-convert-a-readablestream-to-a-buffer

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# Convert a ReadableStream to a Buffer

Bun provides a number of convenience functions for reading the contents of a [`ReadableStream`](https://developer.mozilla.org/en-US/docs/Web/API/ReadableStream) into different formats. This snippet reads the contents of a `ReadableStream` to an [`ArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer), then creates a [`Buffer`](https://nodejs.org/api/buffer.html) that points to it.

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

***

See [Docs > API > Utils](/runtime/utils#bun-readablestreamto) for documentation on Bun's other `ReadableStream` conversion functions.