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How to Create an llms.txt File for Any Website
Eric Ciarla
Jan 15, 2026(updated)
Firecrawl25K subscribers
AI tools often misunderstand websites because they lack structured context. The llms.txt standard fixes this by providing a clear, machine-readable overview of your site—like a sitemap for AI. The llms.txt Generator, powered by Firecrawl, automates the entire process, turning your website into structured files that LLMs can accurately understand.
TL;DR
- What it is: A tool that creates llms.txt files—standardized markdown documents that help AI understand your website
- How it works: Firecrawl crawls your site and formats content into LLM-friendly files using gpt-4o-mini
- Access: Use the web interface at llmstxt.firecrawl.dev or call the API directly
- Cost: Free to use; optional Firecrawl API key removes limits
- Why it matters: Improves how AI assistants, chatbots, and coding tools interact with your content
What is an llms.txt file?
An llms.txt file is a standardized markdown file proposed by Jeremy Howard to provide information to help LLMs use a website at inference time.
Why your website needs an llms.txt file
Making your content accessible to AI tools is becoming as important as traditional SEO. Here's why adding an llms.txt file matters:
| Benefit | Description |
|---|---|
| Improved AI discoverability | LLMs can find and understand your content more accurately, similar to how search engines use sitemaps |
| Better context for AI assistants | Coding assistants and chatbots get structured documentation instead of guessing from scattered pages |
| Reduced hallucinations | Providing clean, organized content helps AI models give more accurate responses about your product or service |
| Developer-friendly documentation | Technical content becomes instantly usable in AI-powered development tools and workflows |
| Future-proof your content | As AI agents become more common, standardized formats ensure your site remains accessible to new tools |
Introducing llms.txt Generator ✨
The llms.txt Generator leverages Firecrawl to crawl your website and extracts data using gpt-4o-mini. You can generate both llms.txt and llms-full.txt files through the web interface or via API.
Accessing llms.txt via API
You can access llms.txt directly by making a GET request to:
http://llmstxt.firecrawl.dev/{YOUR_URL}
For the full version, use:
http://llmstxt.firecrawl.dev/{YOUR_URL}/full
If you have a Firecrawl API key, you can include it to unlock full results and remove limits:
http://llmstxt.firecrawl.dev/{YOUR_URL}?FIRECRAWL_API_KEY=YOUR_API_KEY
How to generate your llms.txt file
- Visit the generator: Go to http://llmstxt.firecrawl.dev.
- Enter your website URL: Input the URL of your website.
- Generate the file: Click the generate button and wait a few minutes as the tool processes your site.
- Download your files: Once ready, download the
llms.txtandllms-full.txtfiles.
Good to know: llms.txt vs robots.txt and sitemap.xml
| File | Primary Purpose | Target Audience | Content Format |
|---|---|---|---|
| robots.txt | Controls what bots can crawl | Search engines and web crawlers | Simple directives (allow/disallow) |
| sitemap.xml | Lists all pages for indexing | Search engines | Structured XML with URLs and metadata |
| llms.txt | Provides context and summaries | Large Language Models | Human-readable markdown with descriptions |
Frequently asked questions
Q: Do I need to update my llms.txt file regularly?
A: Yes, update it when you add major content sections, change site structure, or launch new features. For dynamic sites, consider regenerating monthly or after significant updates.
Q: Can I manually edit the generated llms.txt file?
A: Absolutely. The generator creates a starting point, but you can edit the file to emphasize important sections, remove irrelevant content, or improve descriptions for better AI understanding.
Q: Will having an llms.txt file affect my search engine rankings?
A: No direct impact on traditional SEO. However, as AI-powered search becomes more common, having structured content that LLMs can understand may become increasingly valuable for visibility.
Q: How does Firecrawl help with generating llms.txt files?
A: Firecrawl crawls your website, extracts clean content, and uses gpt-4o-mini to structure it into the llms.txt format. It handles JavaScript-heavy sites and provides both API and web interface access.
Q: Can I use llms.txt for internal documentation or private sites?
A: Yes. While the standard assumes public access, you can generate llms.txt files for private documentation, internal wikis, or knowledge bases to improve how AI tools interact with your content.
Q: Is llms.txt supported by major AI platforms?
A: Adoption is growing. Some AI tools and chatbots already look for llms.txt files when accessing websites. Check the directory at directory.llmstxt.cloud to see which platforms have adopted the standard.