> ## Documentation Index
> Fetch the complete documentation index at: https://bunnynet-cb9733c2-burrow-origin-shield.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Smart Cache

> Prevent accidental caching of sensitive content by limiting caching to known static file types.

By default, Bunny caches all responses from your origin that include cacheable headers like `Cache-Control` or `Expires`. If your server is misconfigured, this could result in sensitive or personalized content being cached and served to other users.

Smart Cache prevents this by only caching responses with specific file extensions and MIME types. Dynamic content passes through to your origin on every request.

<Note>
  Pull Zones accelerated by Bunny DNS have Smart Cache enabled by default.
</Note>

## Enable Smart Cache

<Steps>
  <Step title="Open your Pull Zone settings">
    Go to **CDN** > **Pull Zones** and select your zone.
  </Step>

  <Step title="Navigate to Caching settings">
    Click **Caching** in the left menu.
  </Step>

  <Step title="Enable Smart Cache">
    Check the **Smart Cache** option at the top of the page.
  </Step>
</Steps>

When Smart Cache determines a request is cacheable, the standard cache expiration time settings apply.

## Cacheable extensions

Smart Cache only caches files with these extensions:

| Images          | Video          | Audio          |
| --------------- | -------------- | -------------- |
| avif, bmp, gif  | 3g2, 3gp, asf  | aif, flac, mid |
| heic, ico, jpg  | avi, flv, m3u8 | midi, mp3, mpa |
| jpeg, pict, png | m4u, mkv, mp4  | ogg, wav, wma  |
| svg, svg2, tif  | mpg, swf, ts   |                |
| tiff, webp      | vob, webm, yuv |                |

| Fonts         | Documents           | Archives          |
| ------------- | ------------------- | ----------------- |
| eot, otf, ttf | csv, doc, docx      | 7z, bz2, gz       |
| woff, woff2   | odt, pdf, ppt       | iso, jar, rar     |
|               | pptx, ps, psd       | tar, xz, zip, zst |
|               | srt, txt, xls, xlsx |                   |

| Code & Binaries   | Other         |
| ----------------- | ------------- |
| bat, class, css   | apk, bin, dat |
| dll, ejs, exe, js | dmg, eps, pls |

## MIME types excluded from caching

These MIME types are never cached, regardless of extension:

| MIME Type          |
| ------------------ |
| `text/html`        |
| `application/json` |
| `application/xml`  |

## Override Smart Cache

To cache a file type that Smart Cache normally excludes, create an Edge Rule with the **Override Cache Time** action. This bypasses Smart Cache's decision and caches the response for your specified duration.

<Steps>
  <Step title="Create an Edge Rule">
    Go to **Edge Rules** in your Pull Zone settings and click **Add Rule**.
  </Step>

  <Step title="Set the action">
    Select **Override Cache Time** and enter the cache duration in seconds.
  </Step>

  <Step title="Add conditions">
    Add conditions to match the requests you want to cache, such as file
    extension or URL path.
  </Step>
</Steps>

<Info>
  This is useful for caching HTML pages or API responses that you know are safe
  to cache, such as static site generators or public API endpoints.
</Info>