# Read a file to an ArrayBuffer

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. Use `.arrayBuffer()` to read the file as an `ArrayBuffer`.

```ts index.ts icon="/icons/typescript.svg"
const path = "/path/to/package.json";
const file = Bun.file(path);

const buffer = await file.arrayBuffer();
```

---

Read the binary content of the `ArrayBuffer` with a typed array, such as `Int8Array`. For `Uint8Array`, use [`.bytes()`](/guides/read-file/uint8array).

```ts index.ts icon="/icons/typescript.svg"
const buffer = await file.arrayBuffer();
const bytes = new Int8Array(buffer);

bytes[0];
bytes.length;
```

---

See [Typed arrays](/runtime/binary-data#typedarray) for more on working with typed arrays in Bun.