Server Headers Check - View HTTP Headers
Inspect HTTP response headers for any URL. Check security headers, caching directives, CORS settings, and server configuration at a glance.
Frequently Asked Questions
HTTP headers are metadata sent with web requests and responses. They control caching, security policies, content types, authentication, cookies, and server information.
Security headers like CSP, X-Frame-Options, and HSTS protect against XSS attacks, clickjacking, and man-in-the-middle attacks. Missing security headers can leave your site vulnerable.
Recommended headers include: Content-Security-Policy, X-Content-Type-Options, X-Frame-Options, Strict-Transport-Security (for HTTPS), Referrer-Policy, and Permissions-Policy.
Hiding/obscuring the Server header reduces information leakage about your tech stack, making automated attacks slightly harder. However, it's not a strong security measure - focus on patching and configuration.
Cache-Control tells browsers and proxies how long to store resources. Proper caching improves performance but incorrect settings can serve stale content or waste bandwidth.
Security headers are typically configured in your web server (Apache, Nginx) or application code. Consult your server documentation or use server configuration tools to add recommended headers.
Frequently Asked Questions
What are HTTP headers?
HTTP headers are metadata sent with web requests and responses. They control caching, security policies, content types, authentication, cookies, and server information.
Why should I check security headers?
Security headers like CSP, X-Frame-Options, and HSTS protect against XSS attacks, clickjacking, and man-in-the-middle attacks. Missing security headers can leave your site vulnerable.
What headers should every website have?
Recommended headers include: Content-Security-Policy, X-Content-Type-Options, X-Frame-Options, Strict-Transport-Security (for HTTPS), Referrer-Policy, and Permissions-Policy.
Should I hide the Server header?
Hiding/obscuring the Server header reduces information leakage about your tech stack, making automated attacks slightly harder. However, it's not a strong security measure - focus on patching and configuration.
What does Cache-Control do?
Cache-Control tells browsers and proxies how long to store resources. Proper caching improves performance but incorrect settings can serve stale content or waste bandwidth.
How do I fix missing security headers?
Security headers are typically configured in your web server (Apache, Nginx) or application code. Consult your server documentation or use server configuration tools to add recommended headers.
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