Short answer
llms.txt is a proposed text file that gives AI systems a simple summary of a website and links to its most important pages. It usually lives at /llms.txt, similar to how robots.txt lives at /robots.txt.
It is not a magic ranking file. It is not a security tool. It is not a replacement for good pages. Think of it as a concise site map written in plain English for AI readers.
For a beginner Web4 site, llms.txt can be a low-effort way to explain what the site covers.
What llms.txt is for
AI systems often need to understand a site quickly. A clear llms.txt file can point them to the main sections, official guides, docs, and important context.
A useful file can answer:
- What is this site about?
- Which pages are most important?
- Which guides should be read first?
- Are there docs or policies the AI should prefer?
This fits the broader idea of the Agentic Web: websites can become easier for both humans and AI agents to understand.
llms.txt vs robots.txt
The two files have different purposes.
| File | Purpose | Example use |
|---|---|---|
| robots.txt | Gives crawler access instructions | Allow or disallow crawling certain paths |
| sitemap.xml | Lists URLs for discovery | Tell search engines about important pages |
| llms.txt | Summarizes important site context | Point AI systems to core guides and docs |
robots.txt has a long history in search crawling. llms.txt is newer and less standardized. Beginners should treat it as optional.
Example llms.txt file
Here is a simple version for a content site:
# Example Site
Example Site explains a technical topic in plain English.
## Main Sections
- Home: https://example.com/
- Articles: https://example.com/articles/
- Glossary: https://example.com/glossary/
## Core Guides
- Beginner Guide: https://example.com/articles/beginner-guide/
- Checklist: https://example.com/tools/checklist/Keep the file short, accurate, and easy to maintain.
Does llms.txt help Google SEO?
There is no reliable reason to treat llms.txt as a guaranteed Google ranking factor. It may help some AI systems understand a site, and it may become more useful over time, but beginners should not oversell it.
For traditional SEO, focus first on:
- Useful content.
- Unique titles and descriptions.
- Internal links.
- sitemap.xml.
- robots.txt.
- Fast pages.
- Structured data where appropriate.
Then add llms.txt as an extra clarity layer.
How to create one
Create a plain text file at /public/llms.txt or whatever public folder your framework uses. Add a short site description, main sections, and core guides. Link to canonical URLs, not staging URLs.
For a guide to the surrounding website work, read How to Make Your Website AI Agent Friendly.
Next step
After adding llms.txt, use the Agent-Ready Website Checklist to make sure the rest of your site is clear and crawlable.
FAQ
Is llms.txt an official search engine requirement?
No. It is an emerging idea, not a universal requirement. Use it as a practical summary file, not as a guaranteed SEO factor.
Does llms.txt replace robots.txt?
No. robots.txt gives crawler instructions. llms.txt gives AI systems a human-readable summary and important links.
Should beginners add llms.txt?
If it is quick and accurate, yes. But fix page clarity, internal links, sitemap.xml, robots.txt, and schema first.
What should llms.txt include?
Include a short site description, main sections, core guides, and any important notes that help AI systems understand the site.