The Robots.txt Myth: Does a Missing File Really Delete Your Site from Google?

On 21 January 2026, a report disseminated by webmaster Adam Coster suggests that if a website lacks a robots.txt file, Google Search will refrain from indexing its content, and if the file was once present but is now removed, Google will purge all search results for the domain. The robots.txt file primarily directs crawlers about what a site may be harvested, and Google’s crawler reportedly verifies the file’s existence and adheres to the webmaster’s directives.

In the absence of the file, Google is claimed to treat this as a universal refusal to be indexed, declining to include the site’s content and systematically removing existing entries, a policy corroborated by a Google technical support document published on 23 July 2025. The article notes this approach appears unique to Google, with other search engines typically indexing a site in the absence of robots.txt.

Webmasters are advised to periodically scrutinise traffic metrics and Google Search Console data, and to diagnose any anomalies to ensure the robots.txt file remains accessible.