What is llms.txt? The AI Identity File Your Website Is Missing
What is llms.txt?
The AI identity file your website needs.
AI crawlers visit your website before any human does.
llms.txt is what they read first.
An llms.txt file is a plain-text document at the root of your website that tells AI systems exactly who you are and what you do — in a format they can read directly, without interpretation.
Why llms.txt exists.
When a human visits your website, they read your content, look at your images and form a picture of your business from dozens of contextual cues.
When an AI crawler visits, it reads text and looks for structured information. It does not make the same inferential leaps a human makes.
llms.txt removes that ambiguity with a direct statement of who you are and what you do.
Who proposed it and why it is being adopted.
The llms.txt convention was proposed by Jeremy Howard, founder of fast.ai, in 2024.
It follows the same principle as robots.txt — a simple text file in a well-known location that machines know to look for.
AI companies including Anthropic have indicated support for the convention.
What an llms.txt file contains.
-
Business identity
-
What the business does
-
Who it serves
-
Where it operates
-
Services and pricing
-
Contact information
-
Related entities (parent company, sister businesses)
Does your site pass the AI visibility check?
The only proof that matters is your own.
Run the free check on your own domain. Whatever comes back is real — generated live, against your actual website, in front of you. Nobody can fake that on your behalf.
Free · 60 seconds · No account needed
What llms.txt is not.
It is not a replacement for schema markup — the two serve different purposes. It is not a robots.txt file — robots.txt controls crawler access, llms.txt describes your business.
Both should be present.
How to check if your website has one.
Type your website address into a browser and add /llms.txt to the end. If you see a plain-text document, you have one.
If you see a 404 error, you do not. Most small business websites do not.
Get found by AI. In minutes.
Don't let your competitor be the answer.
Make sure it's you.
Your AI visibility files - generated and delivered automatically in minutes.
Over 90% of businesses are completely invisible to AI search. When a customer asks ChatGPT, Gemini, or Perplexity for a recommendation, the engines only cite the rare brands they can technically verify.
If that isn’t you, your rival gets the lead.
Secure your digital footprint before your competitors wake up to GEO.
Free · 60 seconds · No account needed