Is llms.txt an official web standard?

Not yet. It is a community proposal first published by Answer.AI on September 3, 2024, and formalized at llmstxt.org. Adoption is growing fast: thousands of sites have deployed it, but it has not been ratified by the W3C or IETF.

Do ChatGPT, Claude, and Gemini actually use llms.txt?

Usage varies by model and context. AI agents and coding assistants such as Cursor and Claude Projects actively fetch llms.txt files when building context. Broad consumer chatbots may not crawl it on every query, but the file still helps when AI systems do crawl your domain. Adoption is increasing as the spec gains traction.

What is the difference between llms.txt and llms-full.txt?

llms.txt is the curated index: a lightweight file with links and short descriptions. llms-full.txt is an expanded version that includes the full content of all linked pages, pre-assembled into a single LLM-ready context file. Use llms.txt for discoverability and llms-full.txt for deep context injection.

How often should I update my llms.txt file?

Update it whenever your site structure changes significantly: new product pages, major doc updates, or new use cases. For most SaaS sites, a quarterly review is enough. If you publish content frequently, treat it like a sitemap and regenerate it on every major release.

Does llms.txt replace robots.txt or sitemap.xml?

No. The three files serve different audiences. robots.txt controls crawler access. sitemap.xml helps search engines index every page. llms.txt gives AI models a curated, human-authored summary of what matters on your site. You need all three.

Free Tool

llms.txt Generator

Paste your URL and get a spec-compliant llms.txt file in seconds, structured so AI models can understand and cite your site.

Generate your llms.txt file

Free · No account required · Takes ~5 seconds

What Is an llms.txt File?

An llms.txt file is a plain Markdown file placed at the root of your website (yourdomain.com/llms.txt) that tells AI models what your site is about and where to find its key content.

Proposed by Answer.AI in September 2024, it was designed to solve a real problem: LLMs cannot efficiently parse full HTML pages, so site owners needed a clean, structured way to surface their content to AI at inference time. One well-placed llms.txt file can meaningfully improve how AI models understand and cite your site.

Learn more in our complete llms.txt guide.

llms.txt vs. robots.txt vs. sitemap.xml

llms.txt is the only one built for AI.

File	Purpose	Audience
robots.txt	Controls crawler access	Search engine bots
sitemap.xml	Lists all indexable pages	Search engine crawlers
llms.txt	Curates key content for AI	Large language models

How to Use the llms.txt Generator

1
Paste your URL
Drop in your homepage or any page you want AI models to understand.
2
Generate
The generator reads your content and builds a spec-compliant llms.txt file automatically.
3
Copy or download your file
Grab the output and place it at your server root. Done.

How to Install Your llms.txt File

Upload the file to your domain root so it is reachable at yourdomain.com/llms.txt.

Next.js

Place the file at /public/llms.txt and it will be served at yourdomain.com/llms.txt automatically.

WordPress

Upload to your site root via FTP or a file manager plugin. No configuration needed.

Shopify

Not natively supported. Use a custom app or add a redirect rule pointing /llms.txt to a hosted file.

Webflow

Upload via the Assets panel, then add a redirect from /llms.txt to the asset URL in Site Settings.

llms.txt File Example

A realistic llms.txt for a SaaS company, following the llmstxt.org spec:

# Acme SaaS

> Acme SaaS is a project management platform for distributed
> engineering teams. It integrates with GitHub, Jira, and Slack
> to centralize sprint planning and async standups.

Acme SaaS is designed for teams of 5 to 200 engineers. It supports
Kanban and Scrum workflows and offers a native time-tracking module.
All data is stored in the EU by default (GDPR-compliant).

## Docs

- [Getting Started](https://acmesaas.com/docs/getting-started.md):
  Install the app and create your first sprint in under 10 minutes.
- [API Reference](https://acmesaas.com/docs/api.md):
  Full REST API docs with authentication and rate limits.

## Use Cases

- [Sprint Planning Guide](https://acmesaas.com/guides/sprint-planning.md):
  How engineering leads run two-week sprints across time zones.

## Optional

- [Changelog](https://acmesaas.com/changelog.md): Full release history.
- [Security Overview](https://acmesaas.com/security.md): SOC 2 Type II.

Why llms.txt Matters for AI SEO

AI models use it to map your site: Instead of guessing from crawled HTML, they get a curated, structured overview you control.
It improves citation probability: A clear llms.txt makes it easier for ChatGPT, Claude, and Gemini to surface your content in answers.
It signals content intent: You tell the LLM which pages matter, what they cover, and how they relate. No inference required.
It complements your GEO strategy: Generating the file is step one. The real work is making sure your content is authoritative enough to be cited.

llms.txt is step one. Citeme tracks whether AI models actually cite you and rewrites your content when they do not.

Frequently Asked Questions

Is llms.txt an official web standard?: Not yet. It is a community proposal first published by Answer.AI on September 3, 2024, and formalized at llmstxt.org. Adoption is growing fast: thousands of sites have deployed it, but it has not been ratified by the W3C or IETF.
Do ChatGPT, Claude, and Gemini actually use llms.txt?: Usage varies by model and context. AI agents and coding assistants such as Cursor and Claude Projects actively fetch llms.txt files when building context. Broad consumer chatbots may not crawl it on every query, but the file still helps when AI systems do crawl your domain. Adoption is increasing as the spec gains traction.
What is the difference between llms.txt and llms-full.txt?: llms.txt is the curated index: a lightweight file with links and short descriptions. llms-full.txt is an expanded version that includes the full content of all linked pages, pre-assembled into a single LLM-ready context file. Use llms.txt for discoverability and llms-full.txt for deep context injection.
How often should I update my llms.txt file?: Update it whenever your site structure changes significantly: new product pages, major doc updates, or new use cases. For most SaaS sites, a quarterly review is enough. If you publish content frequently, treat it like a sitemap and regenerate it on every major release.
Does llms.txt replace robots.txt or sitemap.xml?: No. The three files serve different audiences. robots.txt controls crawler access. sitemap.xml helps search engines index every page. llms.txt gives AI models a curated, human-authored summary of what matters on your site. You need all three.