Security Header Scanner

About

🛡️ Security Header Scanner — Instant HTTP Header Analysis

Worried your favorite sites (or your own) are missing critical security headers?
One click is all it takes. ⚡

Security Header Scanner inspects the HTTP response headers of any website you visit
and gives you an instant, easy-to-read security grade — from 🟢 A+ down to 🔴 F —
along with clear, actionable fix recommendations.

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✨ KEY FEATURES
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🎯  One-Click Scanning — Open the popup on any tab and get results in seconds.
🏆  Letter Grade System — A+, A, B, C, D, F. Know instantly where a site stands.
📊  Beautiful Landscape UI — Wide, modern card layout designed for clarity.
🔍  Detailed Header Inspection — See the exact value returned by the server.
💡  Smart Recommendations — Copy-ready header values you can drop into your config.
🔐  100% Local — Headers are fetched directly from the site. No data leaves your browser.
⚡  Lightweight & Fast — Manifest V3, minimal permissions, zero tracking.

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🧪 HEADERS WE CHECK
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✅  Strict-Transport-Security (HSTS)
✅  Content-Security-Policy (CSP)
✅  X-Frame-Options
✅  X-Content-Type-Options
✅  Referrer-Policy
✅  Permissions-Policy

Each missing or misconfigured header comes with a ready-to-use example so you can
fix issues in seconds. 🛠️

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👤 WHO IT'S FOR
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👨‍💻  Web Developers — Verify your deployments ship with proper security headers.
🔒  Security Researchers — Quick recon during assessments and bug bounties.
🧑‍🏫  Educators & Students — Learn how real-world sites configure HTTP security.
🏢  IT & DevOps Teams — Audit production and staging environments on the fly.

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🔐 PRIVACY FIRST
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🚫  No analytics
🚫  No tracking
🚫  No external servers
✅  All scanning happens inside your browser

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🚀 GET STARTED
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1️⃣  Pin the extension to your toolbar
2️⃣  Visit any website
3️⃣  Click the 🛡️ icon — instant grade & report!

Make the web a safer place, one header at a time. 💚