---
title: Escape an HTML string
sidebarTitle: Escape HTML
mode: center
---

The `Bun.escapeHTML()` utility can be used to escape HTML characters in a string. The following replacements are made.

- `"` becomes `"""`
- `&` becomes `"&"`
- `'` becomes `"'"`
- `<` becomes `"&lt;"`
- `>` becomes `"&gt;"`

This function is optimized for large input. Non-string types will be converted to a string before escaping.

```ts
Bun.escapeHTML("<script>alert('Hello World!')</script>");
// &lt;script&gt;alert(&#x27;Hello World!&#x27;)&lt;&#x2F;script&gt;
```

---

See [Docs > API > Utils](/docs/runtime/utils) for more useful utilities.