HTTP Header Analyzer
Parse and analyze HTTP response headers for security issues. Check CSP, HSTS, and more — locally in your browser.
How ZeroData protects your privacy
- ✓ No Uploads: Processing happens entirely via client-side JavaScript.
- ✓ No Storage: We do not have a database. We physically cannot save your data.
- ✓ No Tracking: We don't log what you process or track your inputs.
- ✓ Verifiable: Check your DevTools Network tab. You will see 0 outbound requests.
How to Use the HTTP Header Analyzer
- Copy the HTTP response headers from your browser's DevTools (Network tab).
- Paste the raw headers into the input editor.
- Click Analyze Headers to run the security check.
- Review the grade and fix any missing security headers on your server.
Frequently Asked Questions
What security headers should every website have?
At minimum: Content-Security-Policy, Strict-Transport-Security, X-Content-Type-Options, X-Frame-Options, and Referrer-Policy. These address the most common web vulnerabilities.
How do I get my website's HTTP headers?
Open your browser's DevTools (F12), go to the Network tab, reload the page, click on the main document request, and copy the response headers.
Is this tool accurate for production audits?
This tool checks header presence and provides a weighted score. For production security audits, supplement this with tools like Mozilla Observatory or SecurityHeaders.com.
Are my headers uploaded to a server?
No. All parsing and analysis happens locally in your browser using client-side JavaScript.
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