llms.txt checker
Find format issues and broken links in your llms.txt file. Get clear suggestions for agent documentation.
How the check works
Fetch /llms.txt at the site root, or the explicit llms.txt path you provide. Check the title and link structure against the v2 proposal, then test up to five unique HTTP links.
- This is a focused check against the llms.txt v2 proposal, not a certification or an SEO score.
- Google Search does not use llms.txt to improve rankings. Only a sample of links is fetched.
Read the result, then take action.
Illustrative example — not a live result
A documentation link returns 404
The first sampled link points to a page that is no longer available.
Next step: Replace the link with the current documentation URL, then run the check again.
Common questions
What is llms.txt?
It is a proposed Markdown format for giving agents background information and links to useful website content. It is not an access-control file.
Will llms.txt improve my Google rankings?
Google says it does not use this file for search visibility or rankings. Maintain it when it helps the agents or documentation systems you support.
Use this tool with an agent
Open this page in a WebMCP-compatible browser. Ask your agent to check your URL. The result appears here and is returned to the agent as JSON. Your agent can also use the public POST endpoint.
check_llms_txt({ "url": "https://example.com" })
POST /api/free-tools/llms-txt-checker
Content-Type: application/json
{ "url": "https://example.com" }Results contain findings, evidence, suggested fixes, a check time, and coverage limits. View the tool catalog.