llms.txt Availability Checker

Check whether a website publishes a publicly accessible /llms.txt file and review its response details.

llms.txt Availability Checker

Test the public /llms.txt endpoint for any website

Free

Check llms.txt availability

Enter a domain to test its /llms.txt endpoint.

Enter a website domain to check its root llms.txt file.

What Is the llms.txt Availability Checker?

The llms.txt Availability Checker tests whether a website exposes a public /llms.txt file at its root. It follows the endpoint, reads the HTTP response and distinguishes a real text file from a missing page, blocked response, empty file or HTML fallback.

What the Availability Check Measures

The report includes the HTTP status, content type, file size, HTTPS usage, redirect behavior and final checked URL. These signals help confirm that AI agents and other public clients can retrieve the file.

Why an HTML Response Is Not a Valid llms.txt File

Some websites redirect unknown paths to the homepage while still returning a successful status. This checker identifies HTML responses so a homepage fallback is not incorrectly reported as an available llms.txt file.

Free WordPress plugin

Publish your llms.txt automatically

Generate and maintain a clean /llms.txt endpoint from your WordPress posts, pages, categories and public custom post types.

Download free plugin View plugin features

Related Components

llms.txt Generator & Builder Create an llms.txt file manually, from a sitemap or from a list of URLs. llms.txt Validator Check syntax, Markdown and structure. llms.txt Formatter Clean, beautify and reorder sections. llms.txt Converter Convert between CSV, JSON and HTML. llms.txt Link Checker Find broken and duplicate URLs. llms.txt Analyzer & Previewer Preview, URLs, sections and word count.

Questions you might have

Where should llms.txt be published?
Publish it at the website root so it is available at https://example.com/llms.txt.
Does a 200 response always mean the file exists?
No. Some servers return an HTML homepage for missing paths. The checker also inspects the content type and response body.
Does this validate the file contents?
No. This tool checks public availability and response metadata. Use the llms.txt Validator to inspect syntax and structure.
Can redirects be valid?
A redirect may be acceptable if the final destination is still the intended llms.txt resource. Redirects to a homepage or unrelated path are reported as a problem.
Why might access be forbidden?
Firewall rules, bot protection, authentication, file permissions or hosting security settings may block public access.
llms.txt Split Tool Split large files and download ZIP. llms.txt HTTP Status Checker Inspect the HTTP response code returned by llms.txt.