🛡️Security100% Free Utility

HTTP Header Checker

Audits server response headers including Strict-Transport-Security, Content-Security-Policy, X-Frame-Options, and edge CDN cache hit states.

Run HTTP Header Checker

Reference Benchmark: Modern security headers (HSTS, CSP, X-Content-Type-Options)

What This Metric Means for Your Site

HTTP security headers safeguard users against clickjacking, cross-site scripting (XSS), and SSL downgrade attacks while enforcing efficient browser caching.

How to Improve Your Score (Actionable Fixes)

Enable HSTS with max-age=31536000 and includeSubDomains.
Set X-Content-Type-Options to nosniff to prevent MIME-type confusion attacks.
Configure immutable cache-control headers for static versioned assets.

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Sister Free Tool

Broken Link Checker

Detect 404 dead ends, broken internal anchors, and problematic external links.

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VitalsSniper PRO In-Tab Forensics

Isolate exact DOM elements, generate white-label PDF audit summaries, and export outreach lead lists in 50ms from any live Chromium tab.

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