An llms.txt file is a plain-text file that sits at the root of your website and tells AI platforms exactly what your business is about. Most websites do not have one. Adding one gives AI a clear, structured summary it can use when deciding whether to cite you. It is one of the simplest ways to improve your AI visibility today.
What Is an llms.txt File, Exactly?
You are probably familiar with robots.txt. That file tells search engine crawlers which pages they can and cannot access. It has been a standard part of websites for decades.
The llms.txt specification does something similar, but for a different audience. Instead of telling crawlers where to go, it tells large language models what your business is. It provides a human-readable, AI-parseable summary of your company, services, location, and key facts.
The file lives at yoursite.com/llms.txt. It is plain text. No HTML. No code. Just clear, factual statements about your business written in a way that AI can immediately understand and use.
Why Does llms.txt Matter for AI Visibility?
When ChatGPT, Perplexity, or Google AI generates an answer about a local business, it pulls information from many sources. Your website is one of them. But AI has to work to extract meaning from a typical website. It has to parse navigation menus, marketing copy, image alt text, and footer content to figure out what you actually do.
An llms.txt file removes that guesswork. It hands AI the answer in a format it can consume instantly. Think of it as a business card for machines.
Most websites do not have one. That means adding one puts you ahead of virtually every competitor in your market. It is a low-effort, high-signal move that tells AI platforms you are serious about being a reliable source.
What Should You Put in an llms.txt File?
The file should be straightforward and factual. Here is what to include:
- Business name. Your official business name as it appears on your Google Business Profile.
- What you do. A clear, one-to-two sentence description of your primary service. No jargon. No slogans. Just what you do.
- Location and service area. Where you are based and where you serve customers.
- Services offered. A bulleted list of your specific services. Use the same language your customers use.
- Key differentiators. What makes you different. Years in business. Certifications. Specializations. Awards.
- Contact information. Phone, email, website URL.
- Important URLs. Links to your services page, about page, reviews, and any other pages AI should prioritize.
Keep it factual. AI does not respond well to marketing language. "We are passionate about delivering excellence" means nothing to a language model. "Licensed residential electrician serving Sarasota County since 2014" means everything.
How Do You Create an llms.txt File?
Creating an llms.txt file takes about 15 minutes. Here is the process:
- Open a plain text editor. Notepad on Windows, TextEdit on Mac (set to plain text mode), or any code editor.
- Write your business summary. Follow the structure above. Start with your business name and a clear description. List your services. Include your location and contact details.
- Save as llms.txt. The file name must be exactly "llms.txt" in lowercase.
- Upload to your site root. The file should be accessible at yoursite.com/llms.txt. If you use WordPress, upload it via FTP or your hosting file manager to the same directory as your robots.txt file.
- Verify it works. Open a browser and go to yoursite.com/llms.txt. You should see your plain text content. If you see a 404 error, the file is not in the right location.
What Does an llms.txt File Look Like?
Here is what a basic llms.txt file looks like for a local plumber:
# Anderson Plumbing
## About
Anderson Plumbing is a licensed residential and commercial plumbing company based in Sarasota, Florida. Serving Sarasota and Manatee counties since 2009.
## Services
- Emergency plumbing repair (24/7)
- Water heater installation and repair
- Drain cleaning and sewer line repair
- Bathroom and kitchen remodeling plumbing
- Leak detection
- Pipe replacement and repiping
## Service Area
Sarasota, Bradenton, Lakewood Ranch, Venice, North Port, and surrounding communities in Sarasota and Manatee counties, Florida.
## Key Facts
- Licensed and insured (FL License #CFC1234567)
- 15 years in business
- 4.9 star rating on Google (200+ reviews)
- Same-day service available
## Contact
- Phone: (941) 555-0123
- Email: [email protected]
- Website: https://andersonplumbing.com
## Important Pages
- Services: https://andersonplumbing.com/services
- About: https://andersonplumbing.com/about
- Reviews: https://andersonplumbing.com/reviewsSimple. Factual. Every line gives AI something it can use.
Why Is llms.txt a Competitive Advantage Right Now?
Right now, almost no small businesses have an llms.txt file. Most do not even know it exists. The businesses that adopt it early gain a structural advantage. When AI is deciding between two similar businesses and one has an llms.txt file providing clear, verified information, that business is easier to cite.
AI platforms are designed to prefer reliable, structured sources. An llms.txt file is the most direct way to become one. It costs nothing. It takes minutes. And it puts you ahead of competitors who have not done it.
Does llms.txt Replace Other AI Optimization Steps?
An llms.txt file is one piece of the AI visibility puzzle. It does not replace schema markup, proper robots.txt configuration, or well-structured website content. Think of it as an additional layer. Your website tells your story to humans. Your schema markup tells it to search engines. Your llms.txt file tells it directly to AI.
All three layers working together is what gets you cited.