llms.txt Generator & Validator
Build a spec-compliant llms.txt file for your site — the proposed standard from llmstxt.org for telling LLMs which pages matter most. Visual editor, live validation, and one-click sitemap.xml import.
2 Quick Import Paste sitemap.xml
<loc> entries locally in your browser and auto-organizes them into sections by URL path. Nothing is sent to a server.3 Sections H2 + link list
Where to place llms.txt
your-site/
├── public/
│ ├── llms.txt ← served at /llms.txt
│ ├── llms-full.txt ← optional full content
│ ├── robots.txt
│ └── sitemap.xmlAbout the spec
llms.txtCurated index of high-signal pages
llms-full.txtSingle file with full markdown content
llmstxt.orgRead the spec →
Frequently asked questions
Quick answers about the llms.txt spec, where it goes, and which LLMs honor it today.
What is llms.txt?
A proposed open standard from llmstxt.org. A single markdown file at your domain root that tells LLMs which pages on your site matter most and how to interpret them — written specifically for LLM context windows rather than search-engine crawlers.
How is llms.txt different from sitemap.xml?
sitemap.xml lists every URL for search-engine crawlers. llms.txt curates a small, high-signal set of URLs in markdown with human-written descriptions, organized by section, so an LLM can pick the most relevant pages for the user's question without crawling everything.
What's the difference between llms.txt and llms-full.txt?
llms.txt is the curated index of links. llms-full.txt is an optional companion that inlines the full markdown content of those pages so an LLM doesn't need to fetch each URL individually. Use both when you want maximum compatibility.
Where does the file go on my site?
At the root of your domain, served at https://yoursite.com/llms.txt. Same location convention as robots.txt. No special headers required — just plain text/markdown.
Which LLMs and tools respect llms.txt today?
Adoption is early but growing. Anthropic Claude, Perplexity, Cursor, and several agent frameworks have started honoring the spec. Treat publishing one as low-cost future-proofing — the file is plain markdown that won't break anything if no one reads it.
Is the sitemap import sent to a server?
No. The XML you paste is parsed entirely in your browser using the native DOMParser. Nothing leaves the page. The whole generator works offline once loaded.