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SEO Tools

HTTP Security Headers Checker

Scan your website's HTTP security headers and find out how well it's protected against clickjacking, XSS attacks, and protocol downgrade attacks.

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What the tool checks

  • Strict-Transport-Security (HSTS) — enforcing HTTPS
  • Content-Security-Policy (CSP) — protecting against XSS
  • X-Frame-Options — clickjacking protection
  • X-Content-Type-Options, Referrer-Policy, and Permissions-Policy
  • Overall security score with prioritized recommendations

Why it matters

Security headers protect your visitors and your brand's reputation. Google favors secure websites, and HTTPS is a confirmed ranking signal. Missing headers also make attacks easier — and a compromised or blacklisted site can cause lasting SEO damage.

Detailed guide in the help center

Frequently asked questions

Are security headers an SEO factor?

HTTPS is a confirmed (if lightweight) ranking factor. Other headers don't directly affect rankings, but they protect users and site credibility, which has long-term SEO implications.

What is HSTS?

HTTP Strict Transport Security tells browsers to only connect to your site over HTTPS — even if a user types http:// — preventing protocol downgrade attacks.

What is CSP?

Content-Security-Policy restricts which sources are allowed to load scripts and content on your page, dramatically reducing the risk of cross-site scripting (XSS) attacks.

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