---
title: boltsort.sort
summary: null
url: >-
  https://www.fastly.com/documentation/reference/vcl/functions/query-string/boltsort-sort
---

```
STRING boltsort.sort(STRING url, BOOL only_unique_keys?)
```

> **DEPRECATED**

**Available in:** all subroutines

Alias of `querystring.sort()`.

## Example

```vcl
set req.url = boltsort.sort(req.url);
```