W3 Validator Services

What is W3 Validator Services?

About

W3 Validator Services is an SEO crawler operated by World Wide Web Consortium (W3C). If you think this is incorrect or can provide additional detail about its purpose, please contact us. You can see how often W3 Validator Services visits your website by setting up Dark Visitors agent analytics.

Expected Behavior

SEO (Search Engine Optimization) crawlers do not adhere to a fixed visitation schedule for websites. The frequency of visits varies widely based on several factors, including the search keywords it ranks for, and how many other websites link to it.

Type

SEO Crawler

Discovers search engine optimization insights

Detail

Operated By	World Wide Web Consortium (W3C)
Last Updated	10 hours ago

Insights

Top Website Robots.txts

0% of top websites are blocking W3 Validator Services

Learn How →

Country of Origin

Unknown

W3 Validator Services has no known country of origin

Global Traffic

See All Global Bot & LLM Insights →

The percentage of all internet traffic coming from SEO Crawlers

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Robots.txt

Should I Block W3 Validator Services?

Probably not, especially if you benefit from an SEO service yourself. However, you might choose to block them if you're concerned about things like server resource usage.

How Do I Block W3 Validator Services?

⚠️ Manual Robots.txt Edits Are Not Scalable

New agents are created every day. Instead, serve a continuously updating robots.txt that blocks new agents automatically.

Set Up Automatic Robots.txt

You can block W3 Validator Services or limit its access by setting user agent token rules in your website's robots.txt. Set up Dark Visitors agent analytics to check whether it's actually following them.

# robots.txt
# This should block W3 Validator Services

User-agent: W3 Validator Services
Disallow: /