Tool
Headers Check
Quickly spot missing security headers and configuration issues.
Best for
- Security header audits (HSTS, CSP, etc.)
- Troubleshooting embedding / framing / CORS-related behavior
- Verifying a change after server/CDN updates
What we check
- Common security and caching headers
- Whether headers are present and what they contain
- Simple explain + fix links per finding
You can type
example.com. We’ll assume https:// by default.Next
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Why are security headers important?
Headers like HSTS, CSP, and X-Frame-Options reduce common web risks.
They can also prevent breakages in embeds, iframes, and cross-origin requests.
Why does CSP break my site sometimes?
CSP can block inline scripts, third-party resources, or unexpected domains.
Use the Explain/Fix links per finding to tighten CSP safely without breaking essential assets.
Does this replace a full security audit?
No. This is a fast diagnostic that highlights common issues.
For production security posture, combine it with SAST/DAST and proper threat modeling.
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