# Bun Convert an ArrayBuffer to a Blob

> Convert an ArrayBuffer to a Blob

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

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# Convert an ArrayBuffer to a Blob

A [`Blob`](https://developer.mozilla.org/en-US/docs/Web/API/Blob) can be constructed from an array of "chunks", where each chunk is a string, binary data structure, or another `Blob`.

```ts  theme={"theme":{"light":"github-light","dark":"dracula"}}
const buf = new ArrayBuffer(64);
const blob = new Blob([buf]);
```

***

By default the `type` of the resulting `Blob` will be unset. This can be set manually.

```ts  theme={"theme":{"light":"github-light","dark":"dracula"}}
const buf = new ArrayBuffer(64);
const blob = new Blob([buf], { type: "application/octet-stream" });
blob.type; // => "application/octet-stream"
```

***

See [Docs > API > Binary Data](/runtime/binary-data#conversion) for complete documentation on manipulating binary data with Bun.