llms.txt Validator
Ensure your AI-facing documentation is perfectly formatted. Fetch an existing file from a URL or paste raw Markdown to run a comprehensive validation audit.
Enter your domain (e.g. example.com) or direct file URL. We will automatically append /llms.txt if needed.
Analyzing Content...
How to Use llms.txt Validator
Make sure your llms.txt follows the standard format so AI tools can read it properly.
Fetch or Paste
Enter your website to fetch /llms.txt, or paste the file's text.
Run the Check
The validator reviews the title, summary, sections and links.
Fix & Recheck
Follow the suggestions and check again.
Checks
Structure & links
Input
URL or pasted text
Gives
Clear fixes
Works on
Phone & computer
Price
100% free
Sign-up
Not needed
What Can You Use It For?
Popular ways people use llms.txt Validator.
Before Launch
Test your new llms.txt.
Fixing Errors
Find what's wrong quickly.
Client Sites
Audit llms.txt for clients.
Learning
See what a good file looks like.
Tips for the Best Result
- The file must start with a # title line.
- Links should be full https:// addresses.
- Make a new one with the llms.txt Generator.
Frequently Asked Questions
Quick answers about llms.txt Validator.
A # title, a short > summary, and sections (##) with Markdown links.
Yes. Enter your website and we fetch /llms.txt.
The file may be missing, blocked, or on a private address or unusual port.
Yes.
It's optional, but it can help AI tools describe your site accurately.
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