A URL uses the protected live fetchLive results may be cached for one hourPasted responses stay in this browserResponse debugging guide
Enter a URL or paste the responseThe tool chooses the right mode

Response input

What do you want to check?

Try a typical response first, or put a domain in the first field for a live check.

A single URL uses the protected live fetch. A block beginning with HTTP/ stays in this browser.

Waiting for pasted evidence.

Where do these headers come from?

If you only have a domain, enter it above. AnalyseSpider fetches one public page through the protected gateway and turns the observed status, content type, robots directives and canonical into readable evidence.

For a response from a private test environment, open the Network panel in your browser developer tools and reload the page, or run curl -I https://example.com/. Paste those headers here; that mode makes no network request.

Read the response debugging guide