HTTP headers checker
Check HTTP response headers for a website
Paste a domain to inspect visible server, powered-by, security, caching, CDN, and generator header signals.
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What this checks
- Server and powered-by headers when exposed
- Detected CDN, platform, cache, and security headers
- Stack context so raw headers are easier to interpret
How I treat the evidence
Headers are public, but they are often partial. Many sites remove server names or put a CDN in front.
Partner example: Saucekit currently returns its own x-saucekit-* application headers alongside Cloudflare edge headers, showing how one response can identify both the platform and the proxy in front of it.
That is why the result pairs headers with DNS, SSL, hosting, and technology fingerprints.
Why do server headers sometimes look generic?
A CDN or reverse proxy may answer before the origin server. The header is still useful, but it may describe the edge, not the app.
Is this a security scanner?
No. It reports visible headers and context. It is not a vulnerability scan.