Secure server-side network query (Zero logs)
Web & SEOHTTP Headers Checker
Analyze all HTTP response headers sent by any web server. View security headers (HSTS, CSP, X-Frame-Options), caching rules, and server metadata.
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How it works
- Provide the URL of any public website.
- We query the host and extract all key-value header pairs from the HTTP response.
- Headers are grouped by category with helpful explanations for essential security and caching directives.
Privacy & Processing Information
Ephemeral server-side inspection. Zero tracking, zero storage.
No account, tracking, or file storage required.
Frequently Asked Questions
Why are HTTP security headers important?
Security headers like Content-Security-Policy (CSP) and Strict-Transport-Security (HSTS) protect users against Cross-Site Scripting (XSS), clickjacking, and SSL stripping attacks.
What does Cache-Control do?
The Cache-Control header dictates how browsers and intermediate CDNs cache web pages and static assets.
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