# Bun Convert an ArrayBuffer to an array of numbers

> Convert an ArrayBuffer to an array of numbers

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

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# 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 of the buffer. and use the [`Array.from()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/from) method 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. However if you wish to convert the instance to a regular `Array`, use `Array.from()`. (This will likely be 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 [Docs > API > Binary Data](/runtime/binary-data#conversion) for complete documentation on manipulating binary data with Bun.