# Bun Convert an ArrayBuffer to a Uint8Array

> Convert an ArrayBuffer to a Uint8Array

- Skill: `jarle/bun-convert-an-arraybuffer-to-a-uint8array` (Agent Skill)
- Install (CLI): `npx skillmds@latest add jarle/bun-convert-an-arraybuffer-to-a-uint8array`
- Raw SKILL.md: https://api.skillmd.com/api/skills/jarle/bun-convert-an-arraybuffer-to-a-uint8array/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-uint8array

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# Convert an ArrayBuffer to a Uint8Array

A `Uint8Array` is a *typed array*, meaning it is a mechanism for viewing the data in an underlying `ArrayBuffer`.

```ts  theme={"theme":{"light":"github-light","dark":"dracula"}}
const buffer = new ArrayBuffer(64);
const arr = new Uint8Array(buffer);
```

***

Instances of other typed arrays can be created similarly.

```ts  theme={"theme":{"light":"github-light","dark":"dracula"}}
const buffer = new ArrayBuffer(64);

const arr1 = new Uint8Array(buffer);
const arr2 = new Uint16Array(buffer);
const arr3 = new Uint32Array(buffer);
const arr4 = new Float32Array(buffer);
const arr5 = new Float64Array(buffer);
const arr6 = new BigInt64Array(buffer);
const arr7 = new BigUint64Array(buffer);
```

***

To create a typed array 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 buffer = new ArrayBuffer(64);
const arr = new Uint8Array(buffer, 0, 16); // view first 16 bytes
```

***

See [Docs > API > Utils](/runtime/utils) for more useful utilities.