> ## Documentation Index
> Fetch the complete documentation index at: https://bun-1dd33a4e-farm-71122839-als-unhandled-rejection.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Read a file to a Buffer

The `Bun.file()` function accepts a path and returns a `BunFile` instance. `BunFile` extends `Blob`, so you can read the file lazily in a variety of formats.

To read the file into a `Buffer`, read it as an `ArrayBuffer` with `.arrayBuffer()`, then pass the result to `Buffer.from()`.

```ts index.ts icon="https://mintcdn.com/bun-1dd33a4e-farm-71122839-als-unhandled-rejection/gXVECjd1uv0-p-Th/icons/typescript.svg?fit=max&auto=format&n=gXVECjd1uv0-p-Th&q=85&s=d30887ab03385c8da2c8f8d73d6e1ab7" theme={"theme":{"light":"github-light","dark":"dracula"}}
const path = "/path/to/package.json";
const file = Bun.file(path);

const arrbuf = await file.arrayBuffer();
const buffer = Buffer.from(arrbuf);
```

***

See [Buffer](/runtime/binary-data#buffer) for more on working with `Buffer` and other binary data formats in Bun.