HTTP Headers Checker — Inspect Response Headers Online
Last Updated: April 2026
Inspect HTTP response headers for any URL. Check security headers, caching settings, and server information. Free HTTP headers analyzer. No signup required.
Use HTTP Headers Checker
Launch the HTTP Headers Checker tool — fully free, no signup required.
What Are HTTP Headers?
Important HTTP Security Headers
| Header | Purpose | Example |
|---|---|---|
| Strict-Transport-Security | Forces HTTPS | max-age=31536000 |
| X-Frame-Options | Prevents clickjacking | DENY |
| X-Content-Type-Options | Prevents MIME sniffing | nosniff |
| Content-Security-Policy | Prevents XSS | default-src 'self' |
| Referrer-Policy | Controls referrer info | strict-origin |
How to Use the HTTP Headers Checker
Common Missing Security Headers
Frequently Asked Questions
Q: What are HTTP response headers?
A: HTTP headers are metadata sent by a web server along with every response. They control caching, security policies, content type, and other browser behaviors.
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