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Security Headers Checker

Check which security headers your website uses. Learn which headers to add for better protection.

Live·100% in your browser — no upload

Enter your website's response headers to analyze security posture. Paste headers from browser DevTools (Network → Headers).

How Security Headers Checker works

Check which security headers your website uses. Learn which headers to add for better protection. Everything runs locally in your browser — nothing is sent to external servers.

  1. Enter or paste your data in the field above.
  2. The tool processes the result instantly, while your data stays on your device.
  3. Copy or download the output.

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