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---
name: 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
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
const buf = new ArrayBuffer(64);
const blob = new Blob([buf], { type: "application/octet-stream" });
blob.type; // => "application/octet-stream"
```
---
See [Docs > API > Binary Data](/docs/api/binary-data#conversion) for complete documentation on manipulating binary data with Bun.
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