HTTP Header Checker

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Enter any URL to inspect its HTTP response headers and follow the full redirect chain hop by hop — status codes, caching, security and server headers. Free.

Enter a URL to fetch its response headers server-side and follow every redirect. Results are cached for a few minutes.

Redirect chain

Strict-Transport-Security, Content-Security-Policy, X-Content-Type-Options and X-Frame-Options are the headers scanners most often look for.

Response headers

About HTTP Header Checker

The HTTP Header Checker fetches any URL server-side and shows the complete response headers along with the full redirect chain, hop by hop. You see every intermediate status code — 301, 302, 307 — the URL each hop points to, and the final status, which makes it easy to spot redirect loops, unnecessary hops or an HTTP-to-HTTPS chain that wastes crawl budget.

Beyond redirects, the final response headers reveal caching directives (Cache-Control, ETag), the server signature, content type, cookies flags and compression. The tool also runs a quick security audit, flagging which of the commonly scanned security headers are present or missing: Strict-Transport-Security, Content-Security-Policy, X-Content-Type-Options and X-Frame-Options.

The check runs from our server, so it reflects what a real external client receives rather than what your browser cache shows. Chains are followed for up to 10 hops, lookups are rate-limited, and results are cached for a few minutes.

How to use HTTP Header Checker

  1. Enter the full URL you want to inspect, including https://.
  2. Click “Check headers” and wait a moment while the server fetches the response.
  3. Read the redirect chain to see each hop, its status code and the final status.
  4. Review the response headers table for caching, content and server details.
  5. Check the security section for present and missing security headers.
  6. Use “Copy all headers” to paste the raw list into a ticket or audit document.

Frequently asked questions

Up to 10 hops. If the chain is longer or loops back on itself, the tool stops and reports the chain collected so far — usually a sign of a misconfigured redirect rule worth fixing.

The check runs server-side from our infrastructure, without your cookies, cached responses or logged-in session. That is what search engine crawlers and first-time visitors receive, which is usually the view you want when debugging.

It highlights the headers security scanners most often look for: Strict-Transport-Security (HSTS), Content-Security-Policy, X-Content-Type-Options and X-Frame-Options. Missing headers are listed separately so you know exactly what to add.

Only the URL you enter. The server fetches it once, records the redirect chain and headers, and caches the result for a few minutes. Requests to private or internal hosts are refused for security reasons.

Yes, it is free. Lookups are rate-limited to keep the service fast for everyone, so if you hit the limit, wait a minute and try again.
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