Free SEO Tools
HTTP Headers Checker
Enter a URL to inspect its response headers — caching, content, and common security headers.
What this checks
This tool fetches the URL you enter and reports a fixed, useful set of response headers — cache-control, content-type, content-encoding, location, server, and common security headers like Strict-Transport-Security and Content-Security-Policy. A header shown as missing simply wasn't present in the response — it doesn't necessarily mean anything is broken.
Frequently Asked Questions
- What headers does this show?
- Common ones including cache-control, content-type, content-encoding, security headers, and set-cookie.
- Is this the same as Security Headers Checker?
- No — this lists general response headers; Security Headers Checker specifically evaluates security-relevant headers as present/missing.
- Can I check any public URL?
- Yes, any publicly reachable http/https URL — private and local addresses are blocked for security.