HTTP response headers control caching, security, redirects, and content types, yet they are invisible in the browser. A quick header inspection reveals whether your caching rules work, your security headers are present, and your redirects behave. Our free HTTP Headers Checker fetches and displays them for any URL.
Paste a URL to see the status code, server, content type, cache directives, and security headers like HSTS and Content-Security-Policy, all in one readable view.
