What is llms.txt? The New Standard for AI-Readable Content

As AI platforms become a primary way people discover information, a critical gap has emerged. Traditional web standards like robots.txt tell crawlers where they can and cannot go, but nothing tells AI models what your brand actually wants them to know. Your website might have hundreds of pages, but which ones contain the information that matters most for AI-generated responses about your brand?

The llms.txt proposal addresses this gap directly. It is a simple text file placed at the root of your domain that provides AI models with a structured, authoritative summary of your brand, products, and key information. Think of it as your brand's elevator pitch, written specifically for AI consumption.

The Problem llms.txt Solves

When an AI model like ChatGPT, Claude, or Perplexity encounters a question about your brand, it draws on whatever information it has from training data or real-time retrieval. That information might come from your homepage, a three-year-old blog post, a competitor's comparison page, or a disgruntled customer's review. The AI has no way to know which sources best represent your current brand identity.

This creates several problems:

Outdated information: The AI might describe features you discontinued two years ago or reference pricing that changed last quarter.

Misrepresentation: Without clear guidance, the AI might emphasize aspects of your brand that are not central to your value proposition, or mischaracterize your positioning entirely.

Incomplete picture: Your website might have comprehensive documentation, but if the AI only encountered a few pages during training, it has a fragmented understanding of your brand.

Competitor framing: If competitors write about your brand more than you provide accessible self-descriptions, the AI's understanding may be shaped more by how competitors position you than by how you position yourself.

An llms.txt file gives you a direct channel to communicate with AI models about who you are, what you do, and what matters most about your brand.

How llms.txt Differs from robots.txt

The confusion between llms.txt and robots.txt is common, but they serve fundamentally different purposes.

robots.txt: Access Control

robots.txt is a gatekeeper. It tells crawlers which parts of your site they are allowed to visit and which are off-limits. It answers the question: "Where can you go?" It does not provide any information about your brand or products. A robots.txt file that allows full access tells the crawler it can visit any page, but it says nothing about what those pages contain or which ones are most important.

llms.txt: Information Provision

llms.txt is an information source. It proactively provides AI models with structured information about your brand. It answers the question: "What should you know about us?" An llms.txt file does not control access. Instead, it offers a curated summary of the information you want AI models to prioritize when discussing your brand.

They Work Together

The optimal AEO strategy uses both files in concert:

• robots.txt ensures AI crawlers can access your public content
• llms.txt ensures AI models know which information matters most

A well-configured robots.txt without an llms.txt leaves AI models to figure out your brand on their own. An llms.txt without proper robots.txt configuration might provide a summary, but the AI cannot verify or expand on that summary by visiting your actual pages.

The llms.txt Format

The llms.txt specification is intentionally simple. It is a plain text file, typically written in Markdown, that follows a structured format.

Basic Structure

An llms.txt file typically includes:

# Company Name

> Brief one-line description of what the company does.

## About

A concise description of the company, its mission, and its primary
products or services. This should be 2-4 sentences that capture the
essence of the brand.

## Products and Services

- **Product Name**: Brief description of the product, its key features,
  and target audience.
- **Service Name**: Brief description of the service and what problems
  it solves.

## Key Facts

- Founded: Year
- Headquarters: City, Country
- Industry: Primary industry
- Website: https://example.com

## Documentation

- [Product Documentation](https://example.com/docs)
- [API Reference](https://example.com/api)
- [Getting Started Guide](https://example.com/getting-started)

## Contact

- Support: support@example.com
- Sales: sales@example.com

Placement

The file should be placed at the root of your domain:

https://example.com/llms.txt

Some implementations also support /.well-known/llms.txt as an alternative location, following the convention used by other web standards.

Extended Format: llms-full.txt

The llms.txt proposal also includes an optional extended format called llms-full.txt. While llms.txt provides a concise summary, llms-full.txt can include more comprehensive information, such as detailed product descriptions, full feature lists, pricing information, and extensive documentation links.

The relationship between the two is similar to a summary versus a detailed report. AI models that want a quick understanding reference llms.txt, while those that need deeper information can access llms-full.txt.

What to Include in Your llms.txt

The content of your llms.txt file should be carefully curated. Every line should serve a purpose.

Company Identity

Start with a clear, factual description of your company. Avoid marketing superlatives. AI models respond better to specific, verifiable claims than to phrases like "industry-leading" or "world-class."

Instead of: "The world's leading project management platform trusted by millions."

Write: "A project management platform used by over 50,000 teams, offering task management, time tracking, and resource planning for mid-size businesses."

Product Descriptions

For each product or service, include:

• What it does in plain language
• Who it is designed for (target audience)
• Key differentiators from competitors
• Current pricing model (free, freemium, subscription, etc.)

Be specific about capabilities. "Advanced analytics" means nothing to an AI model. "Real-time dashboards with custom KPI tracking and automated weekly reports" gives the AI concrete information to work with.

Factual Information

Include verifiable facts that AI models often get wrong or omit:

• Founding date and company history
• Geographic presence and headquarters
• Number of customers or users (if publicly disclosed)
• Key partnerships or integrations
• Industry certifications or awards
• Supported platforms or technologies

Links to Authoritative Sources

Point AI models toward the content that best represents your brand:

• Official documentation
• Product pages with current feature information
• Case studies with specific results
• Press releases or news coverage
• API documentation for technical products

What to Exclude

An llms.txt file should not contain:

• Internal jargon that would not make sense to an outside reader
• Confidential information about strategy or unreleased products
• Excessive marketing language or promotional content
• Outdated information that no longer reflects your current offerings
• Content that contradicts information on your website

Creating Your llms.txt File

Using Orbilo's Free Generator

The fastest way to create an llms.txt file is to use Orbilo's free llms.txt generator. The tool analyzes your website and generates a properly formatted llms.txt file based on your existing content. You can then review, edit, and customize the output before publishing it on your site.

The generator handles the formatting and structure, ensuring your file follows the specification correctly. It also identifies key information from your site that should be included, saving you from starting with a blank page.

Manual Creation

If you prefer to create the file manually:

1. Start with your company name as a heading
2. Write a one-line summary as a blockquote
3. Add sections for About, Products, Key Facts, and Documentation
4. Use Markdown formatting for structure and links
5. Keep the total length under 2,000 words for the standard llms.txt
6. Save as a plain text file with the .txt extension
7. Upload to your domain root

Validation

After creating your file, verify that:

• The file is accessible at https://yourdomain.com/llms.txt
• The content loads as plain text (not HTML)
• All links within the file are functional
• The information is accurate and current
• The Markdown formatting renders correctly

How AI Models Use llms.txt

Understanding how AI platforms interact with llms.txt helps you optimize its content.

During Training

When AI crawlers like GPTBot or ClaudeBot visit your site, they may encounter your llms.txt file and incorporate its structured information into their training data. Because the file is designed to be a clear, authoritative summary, it can help shape how the AI model understands your brand at a fundamental level.

During Real-Time Retrieval

When retrieval-based AI platforms like Perplexity visit your site to answer a user question, your llms.txt file provides an immediate, structured overview. Instead of parsing your entire website, the AI can quickly understand your brand's identity, products, and key information from a single file.

During Context Building

Some AI applications use llms.txt as a context source when generating responses about a company. The file serves as a reliable, self-authored reference that the AI can use alongside other sources to construct accurate responses.

The Broader Ecosystem: llms.txt and AEO

An llms.txt file is one component of a comprehensive AEO strategy. It works alongside other optimization efforts:

Structured Data (JSON-LD)

While llms.txt provides a human-readable summary for AI models, JSON-LD schema markup provides machine-readable structured data embedded in your HTML pages. Together, they give AI models both a narrative overview and precise structured data about your brand.

robots.txt

As discussed above, robots.txt controls access while llms.txt provides information. Both are essential for a complete AI content strategy.

Content Optimization

Your llms.txt file should reflect and link to your best content. If your website's content is not optimized for AI consumption, your llms.txt file cannot compensate. Focus on creating content that AI platforms can effectively process alongside your llms.txt implementation.

Brand Monitoring

After publishing your llms.txt file, monitor how AI platforms describe your brand to see if the information in your file is reflected in AI responses. Tools like Orbilo can track your brand mentions across ChatGPT, Claude, Perplexity, and other platforms over time, helping you measure the impact of your llms.txt implementation.

Adoption and Industry Trends

The llms.txt standard is gaining traction rapidly. Major companies across technology, e-commerce, media, and professional services have begun publishing llms.txt files on their domains. Several content management systems and website builders have added native support for generating and hosting llms.txt files.

Industry groups and standards organizations are actively discussing formalizing the llms.txt specification, which would further accelerate adoption and give the format more weight in how AI platforms process web content.

For brands considering whether to adopt llms.txt, the calculus is straightforward: the file is simple to create, costs nothing to host, and gives you a direct channel to influence how AI models understand your brand. There is very little downside and significant potential upside.

Maintaining Your llms.txt File

An llms.txt file is not a set-and-forget asset. It should be updated whenever:

• You launch new products or services
• Pricing changes significantly
• Company facts change (new headquarters, funding rounds, acquisitions)
• You rebrand or reposition your product
• Key leadership changes occur
• New documentation or resources are published

Set a quarterly reminder to review your llms.txt file and ensure it still accurately represents your brand. Outdated information in your llms.txt can be worse than having no file at all, because it presents itself as authoritative.

Getting Started

1. Check if you already have one: Visit https://yourdomain.com/llms.txt to see if your site already has an llms.txt file
2. Generate one for free: Use Orbilo's llms.txt generator to create a properly formatted file based on your website
3. Review and customize: Edit the generated file to ensure accuracy and completeness
4. Publish: Upload the file to your domain root
5. Monitor: Track your AI platform mentions to measure the impact over time using Orbilo's brand monitoring tools

Next Steps

• AI Crawler Bots Explained - Understand the bots that read your llms.txt file
• How to Optimize Your Content for AI Search Engines - Broader content optimization strategies
• What is Answer Engine Optimization? - The fundamentals of AEO

Want to create an llms.txt file for your website? Use Orbilo's free llms.txt generator to get started in minutes.