Visllms.txt checker: does your website have an llms.txt?
The llms.txt is a curated overview of your most important pages for AI systems like ChatGPT, Perplexity and Claude. Enter your domain and instantly see whether an llms.txt exists and how well it is structured. Free, no sign-up, result right here on the page.
What is an llms.txt?
The llms.txt is a text file in the root directory of your website (like robots.txt) that explains to AI systems in Markdown form what your website is about and which pages matter. The format comes from llmstxt.org: an H1 heading with the name, a short description as a blockquote and sections with links to the core pages. AI crawlers find your relevant content faster instead of working through navigation and footers.
A detailed guide with examples is in our article creating an llms.txt.
This is 1 of 16 criteria
The llms.txt is just one of 16 criteria that determine how well AI systems can read and cite your website. The free Vispra check tests all 16 automatically: from robots.txt permissions and structured data to Wikipedia presence, with a score from 0 to 100 and your three biggest gaps as a PDF report.