HTTP headers are hidden metadata sent between your browser and the web server. They dictate how content is cached, how secure the connection is, and what type of data is being returned.

Developers analyze headers to debug caching issues, verify security policies (like HSTS and CSP), and ensure the correct content type is being served.

Yes. Our native backend proxy automatically follows redirects (like HTTP to HTTPS) to retrieve the final destination's headers.

Yes, we perform a clean cURL request directly from our server to the target URL, retrieving the raw, unfiltered headers exactly as the web server sent them.

Strict-Transport-Security (HSTS), Content-Security-Policy (CSP), and X-Frame-Options are excellent headers to ensure your site is secure from common attacks.

Yes, the HTTP HEADERS tool is completely free with no usage limits, sign-ups, or subscriptions required.

No. We do not store or log any of the URLs, domains, or passwords you check using our tools.

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