# Source: https://bun.com/docs/guides/read-file/uint8array.md

> ## Documentation Index
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# Read a file to a Uint8Array

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

To read the file into a `Uint8Array` instance, retrieve the contents of the `BunFile` with `.bytes()`.

```ts  theme={"theme":{"light":"github-light","dark":"dracula"}}
const path = "/path/to/package.json";
const file = Bun.file(path);

const byteArray = await file.bytes();

byteArray[0]; // first byteArray
byteArray.length; // length of byteArray
```

***

Refer to [API > Binary data > Typed arrays](/runtime/binary-data#typedarray) for more information on working with `Uint8Array` and other binary data formats in Bun.