🛡️ Security Headers Checker

Enter a website URL to check its security headers and get an overall grade.

🔒 What Is a Security Headers Checker?

A Security Headers Checker is a tool that scans your website’s HTTP response headers to identify key security configurations. These headers help browsers protect your users from common vulnerabilities like XSS (Cross-Site Scripting), clickjacking, and data leaks. Our tool analyzes important headers such as Content-Security-Policy, Strict-Transport-Security (HSTS), and X-Frame-Options, and gives your site a clear letter grade based on how well it’s secured.

Why Are Security Headers Important?

Security headers act as your first line of defense against browser-based attacks. Without them, your website could unintentionally expose sensitive information or allow malicious scripts to run. By regularly checking your headers, you ensure:

  • Safer data transmission via HTTPS
  • Protection from unauthorized framing or embedding
  • Reduced risk of code injection or clickjacking
  • Improved compliance with web security standards

Even small header misconfigurations can cause SEO and performance issues — for example, poor caching or mixed-content errors.

How Does This Security Headers Checker Work?

Simply enter your website URL and click “Analyze”. Our serverless Cloudflare-powered system performs a real-time HTTP header request, evaluates each header, and grades your security posture from A+ to F. You can export results as a CSV or share them using a unique link — perfect for SEO audits, website security reports, or client documentation.

Best Practices for HTTP Security Headers

Here are some essential headers you should always configure:

  • Strict-Transport-Security (HSTS): Forces HTTPS and prevents SSL stripping attacks.
  • Content-Security-Policy (CSP): Controls allowed resources and scripts to prevent XSS.
  • X-Frame-Options: Protects your site from being embedded in iframes.
  • X-Content-Type-Options: Stops MIME-type sniffing vulnerabilities.
  • Referrer-Policy: Controls how much referrer data is shared.
  • Permissions-Policy: Restricts browser features like geolocation or camera access.

Keeping these headers optimized improves your Core Web Vitals, SEO trust signals, and overall website integrity.

Get Your Free Security Grade Today

Use our free online Security Headers Checker to instantly test your site’s HTTP headers. Understand your site’s strengths and fix weaknesses before attackers or audit tools find them. Boost your ranking, security, and user trust — all in one click.