# Bun Convert an ArrayBuffer to a Buffer

> Convert an ArrayBuffer to a Buffer

- Skill: `jarle/bun-convert-an-arraybuffer-to-a-buffer` (Agent Skill)
- Install (CLI): `npx skillmds@latest add jarle/bun-convert-an-arraybuffer-to-a-buffer`
- Raw SKILL.md: https://api.skillmd.com/api/skills/jarle/bun-convert-an-arraybuffer-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-an-arraybuffer-to-a-buffer

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# Convert an ArrayBuffer to a Buffer

The Node.js [`Buffer`](https://nodejs.org/api/buffer.html) API predates the introduction of `ArrayBuffer` into the JavaScript language. Bun implements both.

Use the static `Buffer.from()` method to create a `Buffer` from an `ArrayBuffer`.

```ts  theme={"theme":{"light":"github-light","dark":"dracula"}}
const arrBuffer = new ArrayBuffer(64);
const nodeBuffer = Buffer.from(arrBuffer);
```

***

To create a `Buffer` that only views a portion of the underlying buffer, pass the offset and length to the constructor.

```ts  theme={"theme":{"light":"github-light","dark":"dracula"}}
const arrBuffer = new ArrayBuffer(64);
const nodeBuffer = Buffer.from(arrBuffer, 0, 16); // view first 16 bytes
```

***

See [Docs > API > Binary Data](/runtime/binary-data#conversion) for complete documentation on manipulating binary data with Bun.