The llms.txt Standard:
Give AI a Clean Summary of Your Business

llms.txt is an emerging plain-text file you place at the root of your domain that gives AI systems a structured, machine-readable summary of your business. Think of it as robots.txt for context -- instead of telling AI what it can crawl, llms.txt tells AI what your business actually is. It is not yet an official standard, but adoption is growing fast and the businesses using it now are getting a head start on AI visibility.

If you have ever asked ChatGPT about a business and gotten a vague or outdated answer, this is partly why. AI systems piece together information from scattered sources -- your website, directories, review platforms, social profiles. The result is often incomplete or slightly wrong. llms.txt gives AI a single, authoritative source of truth about your business, written by you.

Why llms.txt Exists

Websites are built for humans. Navigation menus, hero images, animations, testimonial carousels -- all designed for the human eye. AI systems do not see any of that. They parse HTML, extract text, and try to understand what a business does from content that was never structured for machine consumption.

Schema markup helps -- it embeds structured data into individual pages. But schema is granular. It tells AI about a specific page, a specific FAQ, a specific product. What is missing is a high-level, plain-language summary of the entire business. That is the gap llms.txt fills.

The concept was proposed by AI researchers and developers who recognized that AI discoverability needed something simpler and more direct than crawling an entire website. One file, at a known URL, with everything an AI system needs to accurately describe and recommend a business.

What Goes in an llms.txt File

The format is plain text with clear section headers. No special syntax, no code, no markup. Just clean, factual information organized under headings. Here is a practical example for a local service business:

Notice the format. Clean headers. Bullet points. Direct, factual statements. No marketing fluff. This is not a sales pitch -- it is a reference document for AI systems. Write it the way you would fill out a detailed business profile, not the way you would write a homepage headline.

Where to Put It

Place the file at the root of your domain: yourdomain.com/llms.txt. This follows the same convention as robots.txt and sitemap.xml -- a known URL where AI systems can look for it without any configuration or discovery. The file should be served as plain text (Content-Type: text/plain).

If your site runs on WordPress, you can create llms.txt as a static file in your root directory. If you use a modern framework like Next.js, you can serve it from the public folder or as a route that returns plain text. The important thing is that the URL resolves and returns clean text content.

Who Is Using It Now

Adoption is early but accelerating. Anthropic (the company behind Claude) has publicly endorsed the concept. Several major tech companies, SaaS platforms, and developer tools have implemented llms.txt files on their domains. The AI developer community has largely rallied behind the idea because it solves a real problem -- giving AI systems clean, authoritative context about a business without requiring them to scrape and interpret an entire website.

For small and local businesses, adoption is still minimal. Which means this is an opportunity. The businesses that implement llms.txt now are establishing a direct communication channel with AI systems before their competitors even know it exists. When the standard matures and AI systems start actively looking for llms.txt -- and they will -- early adopters will already have their information indexed.

llms.txt vs Schema Markup

I get this question constantly: if I have schema markup on my site, do I still need llms.txt? Yes. They do different jobs.

Think of schema as the detailed spec sheet for each room in a house. llms.txt is the real estate listing that summarizes the whole property. An AI system uses both -- the listing to understand the big picture, the spec sheets to get details on specific features.

Best Practices for Writing Yours

The Bigger Picture

llms.txt is part of a broader shift in how businesses need to think about their online presence. For twenty years, the question was "how do I rank on Google?" Now it is expanding to "how do I get recommended by AI?" The tools for answering that question are still emerging -- llms.txt, schema markup, AI crawler access, answer-first content formatting.

None of these replace traditional SEO. They layer on top of it. A business with strong SEO and AEO foundations plus an llms.txt file is communicating with both traditional search engines and AI systems. That is the full picture of modern discoverability.

Creating an llms.txt file takes thirty minutes. Maintaining it takes five minutes whenever something changes. The cost is essentially zero. And the potential upside -- being the business AI systems can accurately describe and confidently recommend -- is significant and growing.

Frequently Asked Questions