HTTP Headers Checker
Analyze site security by inspecting HTTP response headers. Check for missing policies like HSTS, CSP, and X-Frame-Options.
What are HTTP Security Headers?
HTTP security headers are response headers that tell the browser how to behave when handling your website's content. By configuring headers like Strict-Transport-Security and Content-Security-Policy, you can actively prevent attacks such as XSS, code injection, and clickjacking.
Why Headers Matter
Security
Headers like Content-Security-Policy and Strict-Transport-Security act as the first line of defense against XSS, clickjacking, and protocol downgrade attacks.
Performance
Cache-Control and Content-Encoding (gzip/brotli) headers tell browsers how to cache and decompress content, significantly speeding up page loads.
Key Headers Explained
Strict-Transport-Security (HSTS)
Forces browsers to use HTTPS for all future requests.
Content-Security-Policy (CSP)
Restricts sources for content like scripts, style, and images to prevent XSS.
X-Frame-Options
Prevents your site from being embedded in iframes (Clickjacking protection).