llms.txt file: role, format, and tool to generate it

You’ve heard of the robots.txt file? The llms.txt file follows a similar concept, but designed for the age of artificial intelligence and language models like ChatGPT. In short, it’s the new web standard that lets sites control how AI systems read and understand their content.

What is an llms.txt file and why it’s becoming essential

The llms.txt file isa small text file (in TXT or Markdown format) placed at the root of a website, such ashttps://tonsite.com/llms.txt. It plays a key role: providinglanguage models (LLMs) with clear information about your site’s structure, content, and context.

If the robots.txt file tells search engines what they can crawl, the llms.txt file tells AI systems what they should understand. It improves the consistency of responses from ChatGPT or other assistants when they reference your site.

Here’s a table to compare the two files:

Differences between robots.txt and llms.txt

In short, the llms.txt file doesn’t replace SEO, it complements it. It helps AI systems better represent your business, offerings, and key pages when generating web-based responses.

The role of the llms.txt file for your website

The role of llms.txt is toimprove visibility and control of your content in the world of LLMs. AI systems increasingly rely on online data to craft responses. If your site doesn’t provide clear guidance, they may interpret or summarise your content inaccurately.
With a well-structured file, you precisely specify:

• Which content should be considered (product pages, articles, documentation).
  
• What information summarizes your business.
  
• Which links are priority to understand your offering.
  
• Which areas should be ignored (such as /admin or /test).
  

A well-designed llms.txt file thus strengthens your contextual SEO and brand image in AI environments. It becomes a strategic tool for marketing and message control.

llms.txt file format and structure

The llms.txt file is very simple to create. It follows a clear, readable format for any engine or auditing tool. Generally, it uses a structure similar to Markdown to remain readable by both humans and bots.

Here’s an example of an llms.txt file:

# llms.txt - Example structure

site_name: Agence Scroll

description: Low-code web agency specializing in Webflow and automation

focus: design, development, SEO, automation

important_pages:

- https://agence-scroll.com/offres

- https://agence-scroll.com/blog

- https://agence-scroll.com/contact

exclude:

- /admin

- /private

Each line conveys clear information: the site name, description, strategic links, and areas to ignore. This standard format ensures language models read the right pages and understand the project’s overall context.

Where to place the llms.txt file on your site

The file must always be placed at the root of the site, just like robots.txt. For example:
https://tonsite.com/llms.txt
This allows crawlers and models to access it easily.
It works with all CMS, whether WordPress, Webflow, or a custom-built site.
Here are some best practices to follow:

• Check that your file is public and accessible via browser.
  
• Use UTF-8 encoding to avoid reading errors.
  
• List URLs in absolute form, never relative.
  
• Test the file after uploading to verify its readability.
  

A common mistake is placing the file in a subfolder or using the wrong format. In this case, it won’t be processed by AI.

How to generate your llms.txt file in seconds

To make things easier, Scroll agency has developed a free, online llms.txt generator: llms-txt-generator.agence-scroll.com.

This tool lets you create your llms.txt file without writing a single line of code.
All you need to do is:

1. Enter your domain name.
   
2. Select or add your site’s key pages (offers, articles, documentation).
   
3. Generate your file in TXT format, ready to download and place at your site’s root.
   

The tool adheres to current web standards and produces a clear, structured file that complies with SEO and LLM communication best practices. It’s compatible with all CMS and can be updated anytime if your offering or content changes.

Avoid these mistakes in your llms.txt file

Here are some tips to keep your llms.txt effective:

• Update your file whenever you add a new important page.
  
• Be precise in descriptions and links; avoid overly generic text.
  
• Ensure the content of listed URLs is public and accessible.
  
• Avoid duplicates between robots.txt and llms.txt: they should be complementary.
  
• Perform a one-off audit to verify the consistency of the provided information.
  

Good documentation and a clear structure make all the difference. A well-written llms.txt file improves AI understanding of your site and strengthens your positioning.

In short: your quick guide to the llms.txt file

• It’s a standard TXT file that helps language models understand your site.
  
• It complements traditional SEO by adding a layer of context and structure.
  
• It should be placed at the root of your site and updated regularly.
  
• You can generate it in minutes using the tool developed by Scroll.
  

By integrating this small file into your site, you gain consistency, visibility, and control over how AIs present your content.

If you want to go further in optimizing your website, SEO, or implementing effective low-code tools, Scroll agency supports you in strategy, development, and digital visibility for your project.