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

# Query String Sort

> Improve cache efficiency by normalizing query parameter order in cache keys.

A caching proxy server treats each URL as a distinct file based on the path and query parameters. However, query parameters can often appear in different orders while producing the same output.

For example, these two URLs return the exact same dynamically generated image:

```bash theme={null}
image.jpg?width=300&height=200
image.jpg?height=200&width=300
```

Without Query String Sort, both URLs are cached separately, wasting storage and reducing your cache HIT rate.

## How it works

Query String Sort automatically rearranges query parameters alphabetically when constructing the cache key. This means:

* Both URLs above resolve to the same cached file
* The cached file can be found regardless of parameter order
* You avoid duplicate cache entries for identical content

## Enable Query String Sort

<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 Query String Sort">
    Check the **Query String Sort** option and save.
  </Step>
</Steps>

## When to use it

Enable Query String Sort when:

* Your application generates URLs with query parameters in varying orders
* You use dynamic image transformations (width, height, quality, etc.)
* You want to maximize cache efficiency for parameterized requests

<Note>
  This feature only affects how the cache key is constructed. The actual URL
  sent to your origin remains unchanged.
</Note>