HTTP Header Checker
Enter a URL to see the response status, every header returned, and the full redirect chain if it redirects.
Overview
HTTP response headers carry information a browser normally hides from view — caching directives, security headers, server identification, cookies being set, and more. This tool fetches a URL server-side and shows exactly what came back, including any redirects followed along the way, so you can inspect the raw response the same way a debugging proxy would.
Redirects are followed and re-validated one hop at a time (capped at a handful of hops) so the final URL and every intermediate hop are visible, not just the end result.
Examples
Checking a URL's headers
https://example.com
content-type: text/html; charset=UTF-8
How It Works
- Enter a full URL, including https:// or http://.
- Complete the verification check if shown.
- Click Check to fetch the URL and inspect its response.
- Review the status code, headers, and any redirect hops followed.
Use Cases
Debugging caching behavior
Check Cache-Control, ETag, and Last-Modified headers to understand how a response is being cached.
Auditing security headers
Confirm headers like Strict-Transport-Security or Content-Security-Policy are actually present on a live response.
Tracing a redirect chain
See every hop a URL redirects through before landing on its final destination.
Tips
- Header names are case-insensitive per the HTTP spec — this tool normalizes them to lowercase in the output.
- Only standard ports 80/443 are checked, and only http/https URLs are accepted.
FAQ
No, it issues a standard GET request, the same as a browser visiting the page.
This tool makes an outbound request to a URL you choose, so a quick bot check helps prevent the tool being used as a way to flood arbitrary sites with automated traffic.
Yes, the tool follows up to 5 redirect hops before stopping, to keep checks fast and bounded.