HTTP Security Headers Checker
Audit HSTS, X-Frame, CSP, etc
📚 Learn more — how it works, FAQ & guide Click to expand
Learn more — how it works, FAQ & guide
Click to expand
HTTP security headers checker
How to use this tool
- 1
Paste HTTP response headers
- 2
See security grade
Frequently Asked Questions
Must-have security headers?
HSTS, Content-Security-Policy, X-Frame-Options or CSP frame-ancestors, X-Content-Type-Options: nosniff, Referrer-Policy, Permissions-Policy.
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100% Privacy. This tool runs entirely in your browser. Your data is never uploaded to any server.