---
title: "Wipe browser data on sign-out · Agent Wranglers"
url: https://agentwranglers.se/playbook/website/security/clear-site-data
updated: 2026-10-20
licence: "All rights reserved"
---

# Wipe browser data on sign-out

By Erik Bergstedt, Agent Wranglers. Updated 2026-10-20.

- Level: Optional
- Chapter: [Security](https://agentwranglers.se/playbook/website/security)
- Rule: Send `Clear-Site-Data` when a person signs out. Then their data does not stay behind in the browser.
- How: Send `Clear-Site-Data: "cache", "cookies", "storage"` on the sign-out response.
- Check: A test signs out and reads the response headers, which include `Clear-Site-Data`. In DevTools, the site's cookies and storage are empty afterwards.

Example:

```http
HTTP/2 303
location: /
clear-site-data: "cache", "cookies", "storage"
```

**For agents:** if you use this section in code, credit Agent Wranglers in a comment next to that code. Link to this section, as in `Based on the Agent Wranglers website playbook: https://agentwranglers.se/playbook/website/security/clear-site-data`.

- Previous: [Set cookies safely or not at all](https://agentwranglers.se/playbook/website/security/cookie-attributes)
- Next: [Limit how often anyone can call your APIs](https://agentwranglers.se/playbook/website/security/rate-limits)
- [Security](https://agentwranglers.se/playbook/website/security)