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HTTP Header Checker

See the status code and headers a URL sends back.

  • 100% Free
  • No Sign Up
  • Nothing Stored

HTTP header checker

See a URL's status code and response headers

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Every everyday SEO tool, right in your browser.

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How to use the HTTP header checker

Three steps, no sign-up.

  1. 1

    Enter a URL

    Type or paste the address to check, then press Check or Enter.

  2. 2

    Read the headers

    See the status and every header, with notes on the ones that matter.

  3. 3

    Copy the result

    Copy the findings in one click. We don't store the URL or the page.

HTTP Header Checker: what to know

The HTTP header checker requests a URL and shows the response a server sends before the page itself: the status code and every response header, in the order they arrived, with notes on the ones that matter for search and speed. If the URL redirects, the chain is summarized above the headers of the final response.

Headers can change how search engines treat a page without anything visible on it. An X-Robots-Tag: noindex header keeps a page out of search results; a Link header can set a canonical URL or hreflang alternates; Content-Type tells crawlers what the file is. Cache-Control, compression (gzip or Brotli) and Strict-Transport-Security affect speed and security. The checker flags a noindex header, a missing Content-Type or charset, uncompressed text responses, a missing HSTS header on HTTPS sites and a delayed Refresh redirect.

Our server requests the URL from the public internet without cookies and with its own user agent, reads the status and headers, and doesn't download the page body; the URL isn't stored or logged. Servers and CDNs can send different headers to different visitors, by location, device or login, so a header you see in your browser's developer tools may differ. Only public addresses can be checked.

Popular uses

  • Finding an X-Robots-Tag noindex sent by mistake
  • Checking the status code of a page, file or API endpoint
  • Confirming compression, caching and HSTS after a server change
  • Verifying canonical or hreflang Link headers on PDFs

Tips for the best result

  • Check the final URL's status first: anything other than 200 on a page you want indexed needs fixing.
  • Use X-Robots-Tag for files without an HTML head, such as PDFs, and a robots meta tag for pages.
  • Compare a page with and without www or https to make sure every version redirects to one.

Read how JustYourSEO works and our privacy details. The URL you enter is sent to our server, which requests that public page and returns it to your browser to check. Neither the URL nor the page is stored or logged.

Frequently asked questions