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HTTP Headers Viewer
View all HTTP response headers
🎯 Related Keywords
http headersresponse headersheader viewercheck http headerswebsite headersserver headers
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❓ Frequently Asked Questions
Everything you need to know about HTTP Headers Viewer
What are HTTP headers?+
HTTP headers are metadata sent with web requests/responses. They control caching, security, content type, redirects, and more. Critical for SEO and security.
Why check HTTP headers?+
Verify security headers (HSTS, CSP), check caching (Cache-Control), see server info, debug content issues, audit SEO setup.
What are important security headers?+
Strict-Transport-Security (HSTS), Content-Security-Policy (CSP), X-Frame-Options, X-Content-Type-Options, Referrer-Policy. All improve security.
What is Cache-Control header?+
Tells browsers how to cache the page. "max-age=3600" = cache 1 hour. "no-cache" = always check. "public" = anyone can cache. Critical for performance.
How does HSTS work?+
Strict-Transport-Security forces HTTPS. Once set, browsers never try HTTP. Prevents downgrade attacks. Use "max-age=31536000" for 1 year.
What does X-Frame-Options do?+
Prevents your site from being embedded in iframes (clickjacking protection). Use "DENY" or "SAMEORIGIN".
What is Content-Security-Policy?+
CSP defines what resources can load (scripts, styles, images). Blocks XSS attacks. Most powerful security header but complex to configure.
Why check Server header?+
Reveals server software (Apache, Nginx, IIS). Older versions have known vulnerabilities. Hide this in production for security.
What are SEO-relevant headers?+
X-Robots-Tag (controls indexing), Cache-Control (page speed), Content-Type (charset), Vary (mobile vs desktop), Last-Modified (caching).
Should I expose detailed headers in production?+
Hide: Server, X-Powered-By, framework versions. Show: security headers (HSTS, CSP, etc.). Reduces attack surface.
How to add security headers?+
In Nginx: add_header directive. In Apache: Header set in .htaccess. In Cloudflare: Rules → Headers. Adds 5-10 minutes setup, huge security improvement.
Can I test headers before deploying?+
Yes! Use staging URLs with our tool. Verify all security headers present before pushing to production.
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