Free llms.txt Checker
Check if your website has a properly configured llms.txt file that helps AI models discover and understand your content.
Free: 10 checks per hour
What It Checks
Our llms.txt checker verifies whether your website has a /llms.txt file, validates its format against the specification, checks for /llms-full.txt, confirms proper linking structure, and evaluates whether your content descriptions help LLMs understand your site effectively.
Why It Matters
llms.txt is an emerging standard that helps large language models discover and navigate your website's content. Without it, AI agents rely solely on traditional crawling, which may miss important pages or misunderstand your site structure. A well-configured llms.txt can significantly boost your visibility in AI-powered search.
How to Fix Issues
Create a /llms.txt file at your website root following the specification. Include a title, description, and links to your most important pages. Optionally provide /llms-full.txt with detailed content. Ensure all linked URLs return 200 status codes and descriptions are clear and concise.
Frequently Asked Questions
What is an llms.txt file?
llms.txt is a standardized text file placed at your website root (/llms.txt) that provides AI language models with a structured overview of your site's content, purpose, and key pages — similar to how robots.txt guides search crawlers.
Is llms.txt required for AI visibility?
While not strictly required, having an llms.txt file significantly improves how AI agents discover and understand your content. It's becoming a best practice for websites that want to be accurately represented in AI-generated responses.
What's the difference between llms.txt and llms-full.txt?
llms.txt provides a concise overview with links to key pages, while llms-full.txt contains detailed content and descriptions. Together, they give AI models both a quick reference and deep context about your site.
How often should I update my llms.txt?
Update your llms.txt whenever you add major new sections, change your site structure, or update your core content pages. A monthly review is a good practice for active websites.
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