If you’ve been reading about AI and websites, you may have come across llms.txt. Some articles describe it as essential for AI visibility. Others dismiss it entirely.

Here’s a clear, honest explanation.

What llms.txt is

llms.txt is a simple text file, written in Markdown, placed at the root of a website, for example yourbusiness.com/llms.txt.

It gives AI tools a concise overview of the site:

  • The name of the site or business
  • A short summary of what it is
  • Links to the most important pages, with a brief description of each

The idea was proposed in 2024 by Jeremy Howard, co-founder of Answer.AI. The reasoning: websites are built for human visitors, full of navigation, scripts, and layout. Large language models (LLMs) work best with clean, concise text. A small, predictable file could help them find what matters most.

A simple example

# Example Landscaping Co.

> Residential landscape design and maintenance serving Anytown and surrounding areas.

## Services

- [Landscape Design](https://example.com/design/): Custom plans for new and existing yards.
- [Lawn Maintenance](https://example.com/maintenance/): Weekly and seasonal lawn care.

## Company

- [About](https://example.com/about/): Our team and service area.
- [Contact](https://example.com/contact/): Request a quote.

That’s it. No special code, and no effect on how your site looks to visitors.

What llms.txt is not

It’s important to be realistic:

  • It’s not an official standard. It’s a community proposal, not a specification from a standards body.
  • It’s not a ranking factor. There’s no public confirmation that major AI answer tools, such as ChatGPT, Google AI Overviews, or Perplexity, use llms.txt to decide what to recommend.
  • It’s not access control. It doesn’t allow or block crawlers. That’s the job of robots.txt and your server settings.
  • It’s not a shortcut. It can’t make up for unclear content, thin service pages, or a weak reputation.

So should you add one?

For most businesses, yes, as a small extra, for three reasons:

  1. It takes minutes. A basic file is short and easy to maintain.
  2. There’s essentially no downside. It doesn’t affect visitors or traditional search.
  3. It’s useful beyond AI answer tools. Developers and AI coding assistants increasingly use llms.txt files to understand documentation and websites, and adoption may grow.

Just keep your expectations grounded. The work that really moves AI visibility is the same work that builds a great website: clear service pages, direct answers to real questions, structured data, consistent business listings, and a genuine reputation.

Tips if you add one

  • Keep it short and focused. Link to your most important pages, not every page.
  • Use plain descriptions. Say what each page covers in one sentence.
  • Keep it accurate. Update it when services, pricing pages, or key information change.
  • Link to clean pages. Make sure the pages you list load fast and clearly explain their topic.

We practice what we recommend. You can see our own llms.txt file here.

Curious whether AI tools can find and understand your website? Request a free AI visibility audit.

Frequently asked questions

Is llms.txt the same as robots.txt?

No. robots.txt tells crawlers which parts of a site they may access. llms.txt is a summary that points AI tools to your most useful content. It doesn't grant or block access.

Will adding llms.txt get me into ChatGPT or Google AI answers?

Not on its own. There is no confirmation that major AI answer tools rely on llms.txt when deciding what to say. Treat it as a small, helpful extra rather than a ranking factor.

How often should I update llms.txt?

Update it whenever your core pages, services, or key information change, so it never points AI tools to outdated content.