If you have been keeping an eye on AI search lately, you may have come across the term “llms.txt file.” It sounds technical. It is not, really.

This post explains what an llms.txt file is, what goes inside one, and whether your website needs one. No developer background required.

What is an llms.txt file?

An llms.txt file is a plain text file that sits at the root of your website and tells AI tools what your site is about.

Think of it as a short briefing document written specifically for AI language models. It tells them who you are, what you do, and where to find your most useful content.

You host it at a simple, predictable address: yourdomain.com/llms.txt

That is it. No complex code, no plugin, no developer needed for the basics.

How is it different from robots.txt?

You are probably already familiar with robots.txt. That file tells search engine crawlers which pages they are allowed to visit and which they should skip.

An llms.txt file works differently. Rather than controlling access, it provides context. It helps AI tools understand your site so they can represent your business accurately when generating answers for users.

Where robots.txt says “here is what you can and cannot crawl,” llms.txt says “here is who we are and what we do.”

They are complementary, not competing.

Why does it matter for AI search?

AI tools like ChatGPT, Perplexity AI, Google AI Overviews and Anthropic Claude are now answering questions that used to go straight to a search results page. Someone types “best accountants in Brisbane” or “how does schema markup work” and instead of ten blue links, they get a direct answer.

That answer is built from websites. From your website, potentially.

If you want to show up in those answers, the AI needs to understand your site clearly. That is where llms.txt comes in. Learn more about how generative engine optimisation works.

How AI tools crawl and read websites

When an AI model is trained or updated, it pulls content from across the web. When AI tools answer questions in real time, they often visit and read websites directly.

In both cases, the AI has to make sense of your site on its own. It looks at your content, your page structure, your headings, and your links. If your site is complex, scattered, or light on context, the AI may get the wrong idea, or skip your site altogether.

An llms.txt file gives AI tools a reliable starting point. A short, accurate summary they can read first, before digging into the rest of your site.

What happens when AI cannot understand your site

Nothing dramatic. Your site does not disappear. But if an AI cannot confidently understand what you do and who you serve, it is less likely to cite your business in a relevant answer.

In a competitive niche, that matters. The businesses that show up in AI-generated answers are the ones AI tools can read, understand, and trust.

What does an llms.txt file actually contain?

The format is simple and flexible. Most llms.txt files include:

  • A short description of the business and what it does
  • Links to the most important pages (services, about, blog)
  • A note about what kind of content is most useful to AI
  • Any context that would help AI give accurate answers about your business

There is no rigid specification you must follow, though a working standard was proposed by Jeremy Howard of Answer.AI. The idea is to keep it clear, honest, and helpful.

A simple example

Here is what a basic llms.txt file might look like for a Melbourne-based accounting firm:

# Clearwater Accounting

> Clearwater Accounting helps small businesses in Melbourne manage their books, tax returns, and financial reporting.

## Key pages

- [Services](/services): Tax, bookkeeping, and financial planning for small business
- [About](/about): Our team and approach
- [Blog](/blog): Plain-language guides on small business finances
- [Contact](/contact): Book a free 20-minute call

## Notes for AI

This site is written for small business owners, not accountants. Content focuses on practical guidance, not technical accounting theory.

That is a real llms.txt file. It took about ten minutes to write.

Does your website need an llms.txt file?

The short answer: probably yes, if you are actively trying to get found in AI search.

The llms.txt standard is still gaining traction. Not every AI tool reads it yet, and its direct impact on citations is still being measured. But it is a low-effort step with no downside, and its relevance is growing as AI search becomes a bigger part of how people find businesses.

Signs it could help your business

You are a good candidate for an llms.txt file if:

  • You publish content regularly (blog posts, guides, resources)
  • You operate in a competitive niche where multiple businesses offer similar things
  • You want to appear in AI-generated answers, not just traditional search results
  • Your website covers a range of topics and a summary would help AI make sense of it
  • You are already thinking about generative engine optimisation as part of your strategy

If you are working on your AI search visibility, an llms.txt file is a sensible part of the technical setup. Think of it alongside schema markup and a well-structured sitemap. See our guide to schema markup for small businesses if you want to tackle both at once.

When it is less of a priority

If your website is a single landing page, your content is minimal, or you are not focused on organic or AI search at all, an llms.txt file is unlikely to move the needle. Build it eventually, but it need not be your first step.

Not sure where your site currently stands with AI search? Book a free GEO visibility check and get a quick read on what AI tools can and cannot see on your site.

How to create an llms.txt file for your website

This is genuinely straightforward. Here is how to do it.

Step-by-step walkthrough

  1. Open a plain text editor (Notepad on Windows, TextEdit on Mac, or any code editor).
  2. Write a short description of your business. Two to four sentences. Plain language, like you are explaining it to a new client.
  3. List your most important pages with their URLs and a one-line description of each.
  4. Add a brief note about your audience or the kind of content on the site, if it would help an AI give a more accurate answer.
  5. Save the file as llms.txt (no capitals, no spaces).
  6. Upload it to the root directory of your website.
  7. Test it by visiting yourdomain.com/llms.txt in a browser. If you see your file, it is live.

That is the whole process. You can always expand the file later as your site grows.

Where to put it on your site

The file must sit at the root of your domain. That means yourdomain.com/llms.txt, not yourdomain.com/blog/llms.txt or any subdirectory.

If you manage your own website, you can usually upload the file via your hosting control panel or FTP client. If a developer manages your site, this is a five-minute job for them.

On most WordPress sites, you can place the file in the public root folder (often called public_html or www).

Common mistakes to avoid

Wrong file location. If the file is not at your root domain, AI tools will not find it. Check yourdomain.com/llms.txt in a browser to confirm.

Being vague. “We are a great business that helps people” tells AI nothing useful. Be specific about what you do, who you serve, and where you operate.

Listing every page. You do not need to include every URL on your site. Focus on the pages that best represent your business and content.

Letting it go stale. If your business changes, your llms.txt file should too. Set a reminder to review it every six months.

Confusing it with robots.txt. An llms.txt file does not control crawler access. If you want to block certain AI crawlers from your site, that is a separate task handled in your robots.txt.

What to do next

Creating an llms.txt file is a small step in a larger strategy for getting found in AI search. If you are serious about showing up in AI-generated answers, it is worth doing, and it is worth pairing with other GEO fundamentals.

A few good next steps:

  • Write and publish your llms.txt file today. It genuinely takes less than an hour.
  • Check whether AI tools are already citing your business. Here is how to find out.
  • Read our overview of generative engine optimisation to understand the bigger picture.
  • If you are not sure how your site reads to AI tools, the gap between what you think they see and what they actually see can be significant.

Want to make sure AI tools are finding and citing your business correctly? We will check your llms.txt setup, structured data, and AI visibility in one go. Get your free GEO audit.