How to Use HTTP Header Checker
1
Enter a URL (including https://).
2
Click Check Headers.
3
All response headers are shown with descriptions and security ratings.
Features
✓Fetches live headers via server-side PHP
✓Security rating for each header
✓Highlights missing security headers
✓Shows: Content-Type, Cache-Control, CSP, HSTS, X-Frame-Options and more
✓Response time shown
Why Use This Tool
Audit website security quickly
Find missing security headers before they become vulnerabilities
Check caching headers for performance
Free alternative to paid security scanners
Frequently Asked Questions
Does it follow redirects?
Yes. PHP's HTTP client follows up to 5 redirects and shows the final destination headers.
Can I check localhost?
No. The server cannot reach your local machine. Use a publicly accessible URL.