> ## Documentation Index
> Fetch the complete documentation index at: https://bun.manicule.dev/llms.txt
> Use this file to discover all available pages before exploring further.
> For every page in one file, fetch https://bun.manicule.dev/llms-full.txt (large).
> To search and read these docs as tools, connect the MCP server at https://bun.manicule.dev/api/mcp.
> Every agent surface: https://bun.manicule.dev/.well-known/llms-manifest.json

# Convert a Buffer to an ArrayBuffer (/guides/binary/buffer-to-arraybuffer)

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Related: [Convert an ArrayBuffer to a string](/guides/binary/arraybuffer-to-string.md), [Convert an ArrayBuffer to a Buffer](/guides/binary/arraybuffer-to-buffer.md), [Convert an ArrayBuffer to a Blob](/guides/binary/arraybuffer-to-blob.md), [Convert an ArrayBuffer to an array of numbers](/guides/binary/arraybuffer-to-array.md), [Convert an ArrayBuffer to a Uint8Array](/guides/binary/arraybuffer-to-typedarray.md), [Convert a Buffer to a string](/guides/binary/buffer-to-string.md)

The Node.js [`Buffer`](https://nodejs.org/api/buffer.html) class views and manipulates data in an underlying `ArrayBuffer`. The `buffer` property returns that `ArrayBuffer`.

```ts
const nodeBuf = Buffer.alloc(64);
const arrBuf = nodeBuf.buffer;
```

***

See [Binary Data](/runtime/binary-data#conversion).