> ## 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 an ArrayBuffer to an array of numbers

To retrieve the contents of an `ArrayBuffer` as an array of numbers, create a [`Uint8Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array) over the buffer, then use [`Array.from()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/from) to convert it to an array.

```ts theme={"theme":{"light":"github-light","dark":"dracula"}}
const buf = new ArrayBuffer(64);
const arr = new Uint8Array(buf);
arr.length; // 64
arr[0]; // 0 (instantiated with all zeros)
```

***

The `Uint8Array` class supports array indexing and iteration. To convert the instance to a regular `Array`, use `Array.from()`. This is likely slower than using the `Uint8Array` directly.

```ts theme={"theme":{"light":"github-light","dark":"dracula"}}
const buf = new ArrayBuffer(64);
const uintArr = new Uint8Array(buf);
const regularArr = Array.from(uintArr);
// number[]
```

***

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