What is llms.txt?
llms.txt is a proposed plain-text format for publishing a concise overview and selected links that may help AI systems navigate website documentation.
llms.txt Generator & Checker
Create a file using the proposed llms.txt format, or check whether a published file is available at the expected root URL. No sign-up is required.
# Click Generate to see preview...
Last updated: August 10, 2026•Built by y4yes Tools Team
Results are generated in real-time. For best accuracy, verify critical issues manually.
What is /llms.txt?
llms.txt is a proposed format for a Markdown-based file at the root of a website. It can summarise a project and point to selected documentation or other useful pages.
The generator creates a simple draft from the details and links you enter. Review the preview, remove placeholders, and publish the final text at example.com/llms.txt.
Know what the checker covers
The checker looks for a reachable text file at the supplied domain or URL. It can identify a missing file or an HTML response that is likely an error page.
It does not perform full proposal-rule validation and does not guarantee AI crawling, indexing, citation, or visibility. Treat the result as a publishing check, not an endorsement by an AI platform.
llms.txt questions
Does llms.txt guarantee AI citations or visibility?
No. Publishing the file does not guarantee AI crawling, indexing, citation, or visibility. Individual services decide which resources they fetch and use.
Where should I publish the file?
Publish it at the root of the canonical website, such as https://example.com/llms.txt, and make sure the URL returns a plain-text response without requiring a login.
What does the Y4Yes checker validate?
The checker confirms whether the expected llms.txt URL can be fetched and whether the response looks like text rather than an HTML error page. It does not certify adoption by any AI service.