bun-types/docs/guides/binary/arraybuffer-to-buffer.md

Type definitions and documentation for Bun, an incredibly fast JavaScript runtime

---
name: 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
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
const arrBuffer = new ArrayBuffer(64);
const nodeBuffer = Buffer.from(arrBuffer, 0, 16); // view first 16 bytes
```

---

See [Docs > API > Binary Data](https://bun.sh/docs/api/binary-data#conversion) for complete documentation on manipulating binary data with Bun.