robots.txt has been a web standard since 1994. In 2025, it has gained new importance as the primary tool for managing AI crawler access alongside traditional search engine access.
How robots.txt Works
The file lives at yourdomain.com/robots.txt and uses simple directives:
- User-agent: Specifies which crawler the rules apply to
- Disallow: Tells crawlers not to access specific paths
- Allow: Permits access to specific paths (overrides Disallow)
- Sitemap: Points crawlers to your XML sitemap
AI Crawler Management
With 52+ AI crawlers now active, managing access is important. The key AI crawlers to know:
- GPTBot: OpenAI (ChatGPT)
- ClaudeBot: Anthropic (Claude)
- PerplexityBot: Perplexity AI
- Bytespider: ByteDance
- Google-Extended: Google AI training (separate from Googlebot)
Recommended Strategy
Allow AI search bots that drive discovery. Block AI training bots that only scrape content for model building. This maximizes your AI visibility while protecting content from unauthorized training use.
AppWT configures robots.txt as part of our technical SEO and AIVO services. We balance visibility with content protection. Learn about our technical SEO.
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Tony Paris
Founder and Tech Wizard at AppWT Web & AI Solutions. With over 29 years of experience in web development, Tony helps businesses succeed online through custom websites, SEO, and AI integration.
Learn more about TonyFrequently Asked Questions
What does robots.txt do?
robots.txt is a text file in your website root directory that tells search engine and AI crawlers which pages they can and cannot access. It is a voluntary protocol -- well-behaved bots follow its directives, though some AI crawlers may ignore it.
Can robots.txt block AI crawlers?
Yes. You can add specific directives for AI crawlers like GPTBot, ClaudeBot, PerplexityBot, and others. However, blocking AI crawlers means they cannot index your content, which means AI assistants cannot recommend your business from that content.
Will incorrect robots.txt hurt my SEO?
Yes, significantly. A misconfigured robots.txt can accidentally block search engines from crawling important pages, preventing them from being indexed and ranked. Always test changes in Google Search Console before deploying.
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