llms.txt checker
Review your llms.txt alongside the access and content signals that matter for AI readiness.
ChatGPT
Claude
Gemini
PerplexityOne file, checked instantly — no email required.
canairead.me
llms.txt checker · Full AI readiness report included
Example AI readiness report
canairead.me · 92/100
What we check
llms.txt is a proposed convention for giving AI systems a concise, curated map of your key content. Adoption among AI platforms is still limited — treat it as a helpful extra, not a priority fix. This checks for the one file; run the full report below for the checks that matter more.
- Whether /llms.txt exists and is reachable
- Whether it starts with the `# Title` heading the proposed spec expects
Passing technical checks is only the starting point. Read why your site might not show up in ChatGPT to work through access, rendering and content issues before expecting citations.
See exactly what is tested and what a score cannot prove in the scan methodology and limitations.
Common problems
Missing entirely
Most sites don't have one yet — this alone isn't a red flag.
Treated as an SEO silver bullet
Some guides overstate llms.txt's current impact; no major AI platform has confirmed it materially affects citations today.
How to fix them
Publish a short, honest summary
A few sentences about what your site is, plus links to your most important pages, is enough — this doesn't need to be exhaustive. Our generator builds one in a minute.
Prioritise the fundamentals first
robots.txt, structured data and clean HTML matter more today than llms.txt does — that's what the full report below covers.
Frequently asked
Do ChatGPT, Claude or Perplexity currently use llms.txt?
Support and usage vary and are evolving. Treat it as an experimental, low-cost addition rather than something to prioritise over core technical fundamentals.
Will adding llms.txt improve my score significantly?
It contributes a small amount to one category. Fixing access, structured data or entity clarity issues will move your score far more.
Is llms.txt the same as ai.txt?
No, and the two get mixed up constantly. llms.txt (llmstxt.org) is a curated content map for AI systems to read. ai.txt is a separate, earlier proposal focused on signalling AI-training permissions, closer in spirit to Google-Extended in robots.txt. They solve different problems and neither is a required standard.
Where should llms.txt live?
At your domain root — yoursite.com/llms.txt — the same place as robots.txt and sitemap.xml. It won't be found anywhere else.
How do I see another site's llms.txt file?
Visit yoursite.com/llms.txt directly in a browser, or run this checker against their domain — it fetches and reads the same file.