What this tool checks
- Cache-Control header
- Expires header
- Caching guidance
Performance and Uptime Tools
Cache Headers Checker
Check browser cache headers and identify caching signals that affect repeat visits and speed.
Run the check
Enter a public target. Checks are a point-in-time sample; private and internal addresses are blocked.
Why it matters
Caching improves repeat visits and reduces server load.
Plain-English examples
- Check static or HTML cache signals
Recommended fixes
- Set appropriate cache lifetimes
- Use versioned assets for long-lived caching
Understanding the result
Use findings as a starting point, confirm the intended configuration with your provider, and retest after a change. A successful check does not guarantee security, delivery, uptime or search rankings. Results depend on public DNS and what the server exposes at the time of the check.
Related tools
Run these checks next for a fuller picture.
Need help fixing the result?
