Evaluate your website's defensive HTTP response headers in real-time. Test HSTS, Content Security Policy (CSP), X-Frame-Options, Referrer-Policy, and get instant copy-paste configs for Nginx, Apache, and Next.js.
Modern browsers support powerful security primitives delivered over HTTP headers. Implementing these headers eliminates entire classes of web application vulnerabilities without modifying backend code.
Forces browsers to connect exclusively over HTTPS, preventing SSL stripping and protocol downgrade attacks. Required for browser preload lists.
Restricts approved origins for scripts, styles, images, and fonts. Primary browser defense against Cross-Site Scripting (XSS) and data injection.
Prevents pages from being embedded in invisible iframes on malicious third-party websites, defeating UI redress and clickjacking exploits.
Blocks browsers from sniffing file content types away from the declared MIME type, preventing uploaded images or text from executing as code.
Controls how much referrer information (paths, query parameters, auth tokens) is broadcast in the Referer header when navigating away from your site.
Explicitly enables or disables browser APIs such as microphone, camera, geolocation, and payment gateways for your site and embedded iframes.
Clear answers on configuring, debugging, and maintaining enterprise-grade HTTP security headers.
HTTP security headers are directive response headers sent by your web server instructing the visitor's browser to activate built-in defensive shields. Without these headers, modern browsers run in standard compatibility mode, leaving web applications exposed to Cross-Site Scripting (XSS), clickjacking, MIME-type sniffing, and man-in-the-middle SSL-stripping attacks.
