Security Header Scanner

Analyze HTTP security headers of any website and get an instant security grade with detailed recommendations.

🛡️ 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. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✨ KEY FEATURES ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🎯 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. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🧪 HEADERS WE CHECK ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✅ 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. 🛠️ ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 👤 WHO IT'S FOR ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 👨‍💻 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. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🔐 PRIVACY FIRST ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🚫 No analytics 🚫 No tracking 🚫 No external servers ✅ All scanning happens inside your browser ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🚀 GET STARTED ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 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. 💚