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bun-src/docs/guides/read-file/mime.mdx
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2026-08-27 21:09:14 +00:00

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---
title: Get the MIME type of a file
sidebarTitle: Get MIME type
mode: center
---
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
```
---
See [File I/O](/runtime/file-io) for more on working with `BunFile`.