What is Google-Extended?

Google-Extended is Google's AI training crawler: it collects pages to train AI models. It is the #7 most blocked of the 29 AI crawlers in the index.

How do I block Google-Extended in robots.txt?

Add these lines to https:// /robots.txt: "User-agent: Google-Extended" followed by "Disallow: /". To allow it, use "Allow: /" instead. Well-behaved crawlers read robots.txt before fetching pages; firewall rules are needed to stop crawlers that ignore it.

How do I check whether my site blocks Google-Extended?

Use the free AI crawler checker at tools.yukai.uk/free/ai-crawler-checker: it shows the status of Google-Extended and 28 other AI crawlers with the exact robots.txt rule.

AI crawler · Google · Training

Which websites block Google-Extended?

As of 2026-10-01, 119 of the 853 popular websites whose robots.txt we could read (14%) block Google-Extended, Google's AI training crawler, on the home page; 46 more block it on some paths. Among the top 100 sites: 18.1%.

14%

of 853 readable sites block Google-Extended

18.1%

of the top 100

most blocked of 29 AI crawlers

688

sites allow it on the home page

Blocked by category

Category	Sites read	Block Google-Extended
News & media	126	41.3%
Social	48	27.1%
AI	9	22.2%
Reference	43	16.3%
Other	260	10%
Entertainment	68	8.8%
E-commerce	58	8.6%
Travel	13	7.7%
Tech	154	3.9%
Government	33	3%
Education	20	0%
Finance	16	0%
Telecom	5	0%

Trend

The daily series for Google-Extended starts on 2026-10-01; a trend appears here as days accumulate.

Latest changes

dailymotion.com: blocked → allowed
eff.org: allowed → partial

Block or allow Google-Extended

User-agent: Google-Extended
Disallow: /

Replace Disallow: / with Allow: / to let it in. A site that blocks training crawlers but wants to be cited in AI answers usually keeps the search and user-triggered crawlers allowed.

FAQ

How many websites block Google-Extended?: As of 2026-10-01, 119 of the 853 popular websites whose robots.txt we could read (14%) block Google-Extended, Google's AI training crawler, on the home page; 46 more block it on some paths. Among the top 100 sites: 18.1%.
What is Google-Extended?: Google-Extended is Google's AI training crawler: it collects pages to train AI models. It is the #7 most blocked of the 29 AI crawlers in the index.
How do I block Google-Extended in robots.txt?: Add these lines to https://<your-site>/robots.txt: "User-agent: Google-Extended" followed by "Disallow: /". To allow it, use "Allow: /" instead. Well-behaved crawlers read robots.txt before fetching pages; firewall rules are needed to stop crawlers that ignore it.
How do I check whether my site blocks Google-Extended?: Use the free AI crawler checker at tools.yukai.uk/free/ai-crawler-checker: it shows the status of Google-Extended and 28 other AI crawlers with the exact robots.txt rule.

Other AI crawlers

Also from Google: Google-CloudVertexBot (7.2%), Google-GeminiNotebook (4.3%), Google-Agent (4.5%).