Google-Extended
A robots.txt control token - not a separate crawler. It governs whether content Google already crawled may be used to train Gemini and Vertex AI.
What Google-Extended is for
Collects pages to train future models. No direct traffic back to you.
Disallowing Google-Extended opts you out of Gemini/Vertex training without affecting Google Search ranking or AI Overviews indexing.
Crawler guide
Evergreen identity, source, and robots.txt handling guidance.
Allow or block Google-Extended
Honours robots.txt. Add one of these to your robots.txt.
User-agent: Google-Extended Disallow: /
User-agent: Google-Extended Allow: /
Google-Extended is a robots.txt directive, not a bot that fetches pages, so it carries no crawl telemetry of its own.
Google's official bot docsOther AI crawlers
Every bot Trakkr tracks is a doorway.
Common questions
What is Google-Extended?
Google-Extended is an AI web crawler operated by Google. A robots.txt control token - not a separate crawler. It governs whether content Google already crawled may be used to train Gemini and Vertex AI.
How do I block Google-Extended?
Add a directive to your robots.txt: "User-agent: Google-Extended" followed by "Disallow: /". Honours robots.txt. Google-Extended is a robots.txt directive, not a bot that fetches pages, so it carries no crawl telemetry of its own.
Does blocking Google-Extended hide me from AI?
Blocking Google-Extended keeps your content out of training data but does not remove you from AI search answers - those are served by the search crawlers. Disallowing Google-Extended opts you out of Gemini/Vertex training without affecting Google Search ranking or AI Overviews indexing.
Identity and robots.txt facts come from Google's published bot documentation. This crawler carries no live telemetry of its own, so only the reference facts are shown.
Telemetry updated Feb 1, 2026.