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llms.txt explained: should your website have one?

llms.txt is a proposed file that gives AI tools a clean summary of your site. What it is, how to create one, and whether it helps AI visibility.

By VISIBI AI team·Reviewed by Adnan Khan, Co-founder & CEO·Updated 29 September 2026·6 min read
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llms.txt is a proposed file that gives AI tools a clean summary of your site. What it is, how to create one, and whether it helps AI visibility.

KEY TAKEAWAYS
✓llms.txt is a proposed markdown file at your site root that summarises key pages for AI tools.
✓It is not an official standard and major AI platforms have not confirmed they rely on it.
✓It is cheap to add — but fundamentals like crawlability and clear content matter far more.

What llms.txt is

llms.txt is a community proposal: a plain markdown file at yourdomain.com/llms.txt that lists your most important pages with short descriptions, making it easier for AI tools to understand your site without parsing complex HTML.

RELATED GUIDEWhat is GEO? A plain-English guide to generative engine optimisation →

What to include

  • A one-line description of your business
  • Links to key service, product and pricing pages
  • Links to documentation, FAQs and policies
  • Short descriptions for each link
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Does it help AI visibility?

Evidence is limited. Treat it as a low-effort extra rather than a strategy. The things that clearly matter are crawlable pages, consistent facts, strong content and third-party mentions.

Don’t block AI crawlers by accident

Check robots.txt and your CDN or firewall rules. Some security settings block AI crawlers such as GPTBot or PerplexityBot, which can stop your content being used in answers.

Common mistakes to avoid

✕Treating AI visibility as a one-off project instead of a monthly habit
✕Describing your business differently on every profile and page
✕Publishing generic AI-written content with no first-hand expertise
✕Blocking AI crawlers by accident in robots.txt or firewall rules
HOW VISIBI CAN HELP

How we help with ai visibility & agents

01BenchmarkWe run your buyers’ real questions across ChatGPT, Gemini, Perplexity and Copilot.
02Fix the foundationsEntity facts, structured data and crawlability — fixed in code by our developers.
03Earn citationsAnswer-first content and third-party mentions on the sites AI trusts.
04Track & repeatMonthly share-of-voice reporting with VISIBI Radar.
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Frequently asked questions

Is llms.txt the same as robots.txt?

No. robots.txt controls crawling; llms.txt is a proposed summary for AI tools.

Will Google use llms.txt?

Google has not said it uses llms.txt for search or AI Overviews.

How long does it take to create?

Usually under an hour for a small site.

AK
Reviewed by Adnan Khan · Co-founder & CEO25 years growing digital businesses across search, AI visibility and ecommerce. Written by the VISIBI AI team.Meet the team →
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