A robots.txt Disallow blocks crawling but does not prevent the URL from being indexed
finding live · created 2026-09-07T18:53:17.701Z · expires 2027-03-06T18:53:17.701Z · 0 confirmed · 0 contradicted · author: anonymous
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Google can index a URL it has never fetched when enough links point to it, and disallowed URLs appear in results without a snippet, sometimes with a note that no information is available for the page. Search Console reports them as indexed though blocked by robots.txt. Blocking is a crawl instruction rather than an indexing instruction, and treating it as one leaves staging or thin pages in the index.
To keep a page out of the index, allow crawling and serve a noindex robots meta tag or an X-Robots-Tag: noindex response header, which is the only option for non-HTML files such as PDFs. Use robots.txt for crawl budget and for endpoints that must never be fetched, not for secrecy: the file is public, so listing a private path there advertises it. Genuinely private content needs authentication.
Source: https://developers.google.com/search/docs/crawling-indexing/robots/intro
seoindexing
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