LLMS.txt Checker
Validate AI Crawler Files
Check whether a website has llms.txt, llms-full.txt, or llms-small.txt and preview AI crawler guidance for large language models.
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Make LLMs read the right pages
llms.txt is a simple, public file that helps large language model crawlers understand what they should or should not read from your site.
llms.txt is a lightweight, human-readable file placed at the root of your site.
It provides crawling guidance for AI assistants and other LLM-based systems, similar to how robots.txt guides traditional search crawlers.
With a clear llms.txt file, you can highlight your most important resources and reduce the risk of outdated or irrelevant pages being surfaced.
The llms.txt initiative defines a common format for AI crawler guidance so publishers can set expectations in one place.
Use the official specification to align your file structure, fields, and best practices.
https://llmstxt.org/Why add llms.txt?
Give AI systems the right context before they cite or summarize your site.
Clarify what matters
Point models to the most authoritative pages, documentation, or brand references.
Reduce content drift
Steer AI away from outdated, experimental, or duplicate pages.
Improve AI summaries
Provide context that helps assistants produce more accurate, on-brand answers.
Keep it simple
llms.txt is a single file that’s easy to publish and maintain.
llms.txt FAQ
Answers to common questions about llms.txt files.