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Does llms.txt help? What the data says
Updated 2 November 2026
llms.txt is a proposed plain-text file at the root of a site that points AI agents to the most useful pages. It sounds helpful, and it is cheap to publish, so many sites have added one. The evidence that it changes AI search results is thin.
What the studies found
- Ahrefs studied all 137,210 domains in its Web Analytics that received traffic in May 2026. About 28% published an llms.txt file, yet 97% of those files received zero requests. The authors concluded that for AI search visibility the file is “largely decoration”, and that the most plausible audience is coding agents.
- SE Ranking analysed about 300,000 domains and found no link between having llms.txt and how often a domain was cited in major AI answers, as reported by Search Engine Journal. Only about 10% of the domains had the file.
How to treat it
Publishing llms.txt is easy and unlikely to hurt, but do not expect it to raise citations, and do it after the things that do matter: letting search crawlers in, serving real content in the first HTML, and a clean sitemap and canonical setup. That is why this checker looks at llms.txt last and marks it optional.
If you do publish one, keep it short, link to your most important pages, and treat it like any public file: do not list anything you would not want found. Check your server logs before investing more time, to see whether anything actually requests it.
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