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Headers Test

HTTP Headers Test | Free HTTP Header Analyzer Tool 2026
⭐ 4.9/5 | 100% Free

HTTP Headers Test: Analyze Response Headers for Security & SEO

Enter any URL to inspect HTTP response headers. Check for security headers (CSP, HSTS, X-Frame-Options), caching policies, server software, and more.
Enter a URL to fetch HTTP headers.
🔒 SSL Secure✅ GDPR🚫 No Logs
🔒 HTTP Headers Dashboard example.com Test Security Headers ✅ X-Frame-Options: SAMEORIGIN ✅ Strict-Transport-Security present ⚠️ Content-Security-Policy missing

📸 Live preview — Security and SEO headers.

Why HTTP Headers Matter for SEO & Security

HTTP response headers provide crucial metadata about your server's response. Security headers (like Content-Security-Policy, X-Frame-Options, HSTS) protect against XSS, clickjacking, and man-in-the-middle attacks. SEO-related headers (Canonical, Cache-Control, Last-Modified) influence crawling and indexing. Our tool fetches headers via a fetch request (CORS permitting) and displays them in a human‑readable format, highlighting important security indicators.

Common headers to check: Strict-Transport-Security (forces HTTPS), X-Content-Type-Options (prevents MIME sniffing), Referrer-Policy, Content-Security-Policy (CSP), and X-Frame-Options (clickjacking protection). Missing security headers expose your site to risks; we flag them for improvement.

📌 How to Use

  1. Enter any URL (with http:// or https://).
  2. Click "Test Headers".
  3. Review the list of response headers and security recommendations.

✨ Features

🔍 Full HTTP headers display
🛡️ Security header detection (CSP, HSTS)
📊 Caching headers analysis
⚡ Instant results
📱 Mobile-friendly
🆓 Unlimited free

🔍 Most Searched Keywords

http headers testsecurity headers checkerhsts testcsp testerx-frame-options test

⚙️ How It Works

The tool uses the Fetch API to request the URL, then extracts the response headers from the Headers interface. Because of CORS restrictions, the tool may only see a subset of headers on some sites. For complete analysis, use it on your own domains where CORS is less restrictive. The output is displayed as key‑value pairs, with security flags highlighted.

🎯 Benefits

✅ Identify missing security headers.
✅ Improve browser security posture.
✅ Optimize caching for better performance.
✅ Free and private.

🔗 Related Tools

SSL CheckerSecurity Headers Scanner

❓ FAQ

❓ Why can't I see all headers?
CORS restricts access to certain headers from cross‑origin requests. Use a server‑side tool for full visibility.
❓ What is a good security header set?
At minimum, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, and HSTS (if HTTPS).
❓ Is it free?
Yes, forever.

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