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Security Headers Checker

🟢 Live dataUnlimited

Audit HSTS, CSP, X-Frame-Options, COOP, COEP and 5 more security headers — graded A+ to F with fix recommendations. 100% live HTTP probe, no API key required.

What it does

Fetched in real time from an authoritative API (Google, DataForSEO, etc.). Numbers are real.

What you need to provide

Website URLrequired
Example: https://yoursite.com

Free tier limits

Unlimited. This tool runs on free APIs (Google / open data) — unlimited usage on every plan.

Try it

Open Security Headers Checker →