What is an llms.txt file?

The llms.txt file is an emerging standard, similar to robots.txt, specifically designed to guide artificial intelligence agents (like ChatGPT, Claude or Perplexity) in understanding your website.

Why does AI need specific directives?

AIs tend to hallucinate information (invent prices or features). An llms.txt file allows you to define a 'System Prompt' that forces AI to use only factual data and source your URLs.

What is the difference between robots.txt and llms.txt?

robots.txt grants access permissions (right to read or not). llms.txt provides context and semantics (how to interpret what is read). Both are complementary.

Where should I place this file?

It must be publicly accessible at the root of your domain, for example: https://your-site.com/llms.txt. It can be linked directly from your robots.txt.

Does this improve my classic SEO (Google)?

Indirectly. AI optimization (GEO) better structures your data, which also benefits classic search engines. Google itself uses AI (AI Overviews) to generate its own summaries.

How to manage private data or my paywall?

In the 'Constraints' section of your llms.txt, you can explicitly prevent AI from ingesting certain sections of your site, or require it to specify that access to certain resources is paid.

How often should this file be updated?

Update it with every major change to your offering (price change, strategic pivot, key new feature) to prevent AI from propagating outdated information.

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Core_Identity [Required]

Base URL

Entity name

Description (Factual Summary)

Be extremely factual. AI ignores marketing jargon.

AI_Directives [Value Add]

System Prompt (AI Role)

Conditions the LLM behavior when reading your site.

Anti-Hallucination Constraints

Strict rules to prevent AI from inventing information about you.

Sitemap_Routing [Navigation]

Authority pages (Title | Absolute URL)

Point to URLs containing valuable "Data" (Docs, FAQ, Pricing). Relative links are discouraged for AI.

File: /llms.txt Format: Markdown

How to use it?

Host the downloaded file at the root of your domain (e.g. yoursite.com/llms.txt). Also add the line llms: https://yoursite.com/llms.txt in your robots.txt.

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llms.txt Generator

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