Blocked, private, or unpublished? Paste llms.txt content to validate
How to use
01
Enter your site URL
We fetch /llms.txt and check it against the spec.
02
Review the report
Errors, warnings, link health, and llms-full.txt detection.
03
Fix and re-run
Update your file and validate again.
Why llms.txt Validator
- Validate any site's llms.txt against the llmstxt.org spec: single H1 title, summary, sections, and link lists.
- Checks that the links inside actually resolve, so AI crawlers do not hit dead ends.
- Detects llms-full.txt too, so you know both files are in place.
- Paste-in mode validates a file you have not published yet, or one behind a login.
Common questions
What makes a valid llms.txt?
A single H1 title, an optional blockquote summary, then H2 sections containing markdown link lists. This tool checks each rule.
Where should llms.txt live?
At your site root: https://yourdomain.com/llms.txt, next to robots.txt.
Is llms.txt Validator free to use?
Yes. llms.txt Validator is completely free. There is no sign up, no trial, and no usage cap.
Do I need an account to use llms.txt Validator?
No. You can start using llms.txt Validator straight away. We do not ask for an email address or a login.
Does llms.txt Validator send my data to a server?
llms.txt Validator needs to contact a server to do its job, for example to fetch a page or process a request. We use that data only to return your result and do not sell it or use it to build a profile of you.
Do you keep the URL or details I submit to llms.txt Validator?
We keep it only as long as needed to return your result, then it is discarded. We do not use it for advertising.
Will using llms.txt Validator change my website?
No. llms.txt Validator only reads and analyzes. It never edits or publishes anything on your site.
Is the data from llms.txt Validator fetched live?
Yes. llms.txt Validator works from the current version of the page or resource you point it at.
How do I use llms.txt Validator?
Paste your URL and llms.txt Validator reads the page and pre-fills what it can. Review the fields, make any changes, then copy or download the result.
Does llms.txt Validator work on phones and tablets?
Yes. llms.txt Validator is responsive and works in any modern browser on mobile, tablet, and desktop.
Which browsers does llms.txt Validator support?
It works in current versions of Chrome, Firefox, Safari, and Edge. For the best experience, keep your browser up to date.
Is there a limit on how often I can use llms.txt Validator?
No. You can use llms.txt Validator as many times as you need, at no cost.
Can I use llms.txt Validator for commercial or client work?
Yes. You are free to use the output in personal, educational, and commercial projects.
Why is llms.txt Validator free?
The site is supported by advertising, which lets us keep every tool free and open to everyone.
What should I do if llms.txt Validator gives an unexpected result?
First check that your URL or details is formatted as expected. If something still looks wrong, use the feedback link on the page and we will take a look.