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.