Do noindex or nosnippet block AI answers?

WebAISEO: free AI-search check Prices WebAISEO Terms For AI agents

Published 11 November 2026 · by TrueTest

A single tag can keep a good page out of AI answers: noindex asks engines not to list the page, and nosnippet asks them not to quote it. They are often set by accident: a staging setting left on, an SEO plug-in option, or a header added by the server for a whole folder.

Check my page's tags free See a full example first

Type your address into the box at the top of the WebAISEO page: the Readiness basics check reads one public page and its robots.txt, sitemap and llms.txt, takes a few seconds, needs no sign-up and is free. The paid audits are described on the WebAISEO page.

Which signals does the check look for?

Signal	What it asks engines
`noindex`	do not list this page in results
`nosnippet`	do not show a quote or summary from it
`noai`	do not use it for AI (a newer, unofficial value some sites use)
`noimageai`	do not use its images for AI (unofficial)

The check reads every <meta name="robots"> and <meta name="googlebot"> tag and the X-Robots-Tag response header. Any of the four words is a fail worth 8 points in the AI crawler access area: "Remove noindex / nosnippet from pages you want quoted."

Where do these tags hide?

The server header: X-Robots-Tag: noindex does not show in the page source; you see it only in the response headers.
CMS settings: a "discourage search engines" switch, or a per-page "hide from search" box.
Staging copies: a site copied from a test server with its noindex still on.
A template: one layout file used by every page of a section.

When is noindex right?

For pages that should not be found: logins, carts, private dashboards, thank-you pages, internal search results. Our own private lab and share pages carry noindex, nofollow on purpose. The check is about the pages you want quoted.

Is nosnippet ever worth keeping?

If a page must not be quoted (paid content, legal text you want read in full), it is a fair choice, with the cost that AI answers cannot use the page's words.

More guides: llms.txt checker: does my site need one? · Schema and structured data for AI search · Can AI crawlers read my JavaScript site? · AI readiness check as an MCP tool · Headings that AI answers can lift · Author, dates and trust signals · Sitemaps, HTTPS and speed for AI crawlers · AI search optimisation vs classic SEO

Questions people ask

How do I see the X-Robots-Tag header?

In the browser's developer tools, open the Network tab, reload, click the page request and read the response headers. The free check reads it for you.

Does robots.txt Disallow do the same as noindex?

No. Disallow stops crawling; noindex asks engines not to list a page they did read. A page blocked in robots.txt cannot even be read to see its noindex.

Is noai respected by AI companies?

It is not an agreed standard. The check flags it because it shows the page's intent; robots.txt rules per crawler are the stronger signal.

Is the check free?

Yes. It reads one page and needs no sign-up.