# Get the MIME type of a file

The `Bun.file()` function accepts a path and returns a `BunFile` instance. The `BunFile` class extends `Blob`, so use the `.type` property to read the MIME type.

```ts
const file = Bun.file("./package.json");
file.type; // application/json;charset=utf-8

const html = Bun.file("./index.html");
html.type; // text/html;charset=utf-8

const image = Bun.file("./image.png");
image.type; // image/png
```

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See [File I/O](/runtime/file-io) for more on working with `BunFile`.