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

You’ve probably heard of the robots.txt file. The llms.txt file follows a similar idea, but it’s 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 AIs 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, likehttps://yoursite.com/llms.txt. It plays a key role: providinglanguage models (LLM)with clear information about your site’s structure, content, and context.

If therobots.txtfile tells search engines what they can crawl, the llms.txt file tells AIs 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:

The differences between robots.txt and llms.txt

In short,the llms.txt file doesn’t replace SEO, it complements it. It helps AIs better present your business, offerings, and key pages when they generate web-based responses.

The role of the llms.txt file for your website

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

• Which content should be considered (product pages, articles, documentation).
  
• Which information summarizes your business.
  
• Which links are priority for understanding your offering.
  
• Which areas should be ignored (like /admin or /test).
  

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

Format and structure of the llms.txt file

The llms.txt file is very easy tocreate. It follows a clear format that’s readable by any engine or auditing tool. Generally, it uses a Markdown-like structure 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/offers

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

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

exclude:

- /admin

- /private

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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, exactly like robots.txt. For example:
https://yoursite.com/llms.txt
This allows crawlers and models to access it easily.
It works on all CMS, whether WordPress, Webflow, or a custom 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 recognized by AIs.

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 the current web standard 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 evolves.

Don’t make 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.
  
• Conduct periodic audits 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 AIs’ overall understanding of your site and strengthens your positioning.

In summary: 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 must be placed at the site’s root and updated regularly.
  
• You can generate it in minutes using the tool developed by Scroll.
  

By adding this small file to 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.

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