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Free HTTP Header
Checker

Inspect the raw response headers of any URL — status code, cache-control, content-type, x-robots-tag and more.

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What does an HTTP header checker show?

Every page request returns a set of response headers before the content. This tool surfaces them so you can verify the status code, see caching directives (cache-control, expires), content type, security headers and — critically for SEO — any x-robots-tag that could be silently blocking indexing.

Why it matters for SEO

  • An x-robots-tag: noindex header keeps a page out of Google even if the HTML looks fine.
  • Wrong status codes (e.g. soft 404s returning 200) confuse crawlers.
  • Cache headers affect how often bots re-fetch a page.

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Frequently asked questions

What is the x-robots-tag header?

It's an HTTP-level indexing directive. x-robots-tag: noindex blocks a page from Google even without a meta tag — a common hidden cause of deindexing.

Why is my page returning 200 but not indexing?

A 200 only means the server responded. Check for noindex headers/tags, canonicalization, or that the page (and its backlinks) have actually been crawled.

Does this follow redirects?

No — it shows the direct response for the URL you enter, so you can see redirect status codes themselves.

Can headers explain unindexed backlinks?

Yes. If a linking page sends noindex or error status, the link won't count. For uncrawled-but-valid links, force-index them with BacklinkIndex.

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