Web Security Header Audit
Inspect server response headers for critical security configurations like CSP, HSTS, and X-Frame-Options to prevent XSS and Clickjacking.
What does the Security Header Auditor do?
This tool reviews the security posture of common HTTP response headers. It focuses on browser-enforced controls such as Content-Security-Policy, Strict-Transport-Security, X-Frame-Options, X-Content-Type-Options, and Referrer-Policy.
Why security headers matter
Security headers tell browsers how to handle scripts, frames, HTTPS enforcement, MIME sniffing, referrer leakage, and other risky behaviors. They are not a full security program, but they are an important baseline for reducing common web attack paths.
Who benefits from it?
Web developers, security engineers, DevOps teams, site owners, SaaS operators, and students can use header checks to identify missing hardening controls before a public release.
Common use cases
Use it during launch reviews, after moving to a new CDN, when hardening Nginx or Apache, before applying for security compliance checks, or when explaining browser protections to a team.
FAQ
Is CSP required for every website? It is strongly recommended, especially for sites with logins, forms, dashboards, or user-generated content.
What does HSTS do? HSTS tells browsers to use HTTPS for future visits, reducing downgrade and insecure redirect risk.
Do headers replace secure code? No. Headers reduce browser-side risk, but secure coding, patching, access control, and monitoring are still required.