An llms.txt generator that produces the markdown file some AI engines read to understand your site. llms.txt — the file format proposed for AI crawlers at llmstxt.org — lives at the root of your domain (llms.txt) and lists what your site is about and which pages matter most. It is optional: Google states it is not required for Search or AI Overviews, but crawlers from OpenAI, Anthropic, Perplexity, and Google are documented to fetch it.
What is llms.txt and when does it help
llms.txt is a markdown file at your domain root that tells AI engines what your site is, in plain text — a title, a one-line description, and a prioritized list of pages with one-line summaries. It exists because AI crawlers need a reliable, unambiguous map of your content, and most sites do not have one. Treat it as optional polish: Google explicitly says websites do not need it to appear in Search, AI Overviews, or AI Mode. Its value is improving how AI crawlers discover and understand your content — not ranking.
The format an AI engine expects
The llms.txt spec follows Markdown conventions. The file starts with an H1 title, an optional blockquote description, and an ordered list of pages: each entry is a Markdown link with an optional colon-separated summary. Everything after the H1 is a suggestion, not a requirement — the generator produces this exact format, so the file is valid the moment you copy it.
Which pages belong in llms.txt
List your most important pages first: the homepage, key product or service pages, and your best content — the pages you would want an AI to cite when someone asks about your industry. Keep summaries to one line and descriptive, not salesy. AI engines use them to decide whether a page answers a question.
Pair it with the URL Debugger
The generator and the URL Debugger are designed to work together: the debugger audits a URL and tells you whether an llms.txt file exists at its origin, then the generator creates one in the exact format the debugger detects. Deploy the file to your domain root and re-run the debugger to confirm.