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llms.txt Checker

Check a site’s optional llms.txt file and review its Markdown headings, links, and source text.

llms.txt Checker: TOEA requests /llms.txt from the site root unless a direct path is supplied, then summarizes its plain-text or Markdown structure. Processed securely on demand.

Category
Web tools
Runs
On TOEA's server
Cost
Free · no sign-up
Availability
Ready to use
llms.txt readerSafe public URL check

Checks the root /llms.txt unless you provide a direct llms.txt URL.

What an llms.txt file contains

llms.txt is a proposed convention (llmstxt.org, 2024) for a short Markdown file at the site root that points language models to the pages worth reading. It is optional, it is not a crawler permission — that remains robots.txt's job — and no AI provider is obliged to read it.

PartRule
# Site nameOne H1 with the project or site name. The only required element.
> SummaryA blockquote giving the key context in a sentence or two.
ParagraphsOptional notes on how to read the rest of the file.
## SectionH2 headings, each followed by a list of links: - [Title](url): optional note.
## OptionalA section whose links can be skipped when context is short.

Example

# Example Docs

> Example is a payments API. These pages cover setup, the REST reference, and SDKs.

## Guides
- [Quickstart](https://example.com/docs/quickstart.md): first request in five minutes
- [Authentication](https://example.com/docs/auth.md)

## Optional
- [Changelog](https://example.com/changelog.md)

Keep it useful

  • Link to clean Markdown or plain pages rather than script-heavy ones.
  • Prefer a short, curated list over a copy of the sitemap; a longer companion llms-full.txt can hold full text.
  • Use absolute URLs, and re-run this checker after publishing to confirm the links resolve.
  • Crawler access is still governed by robots.txt — check it with the robots.txt checker.

How to use it

  1. Enter a website or direct llms.txt URL.
  2. Choose Check llms.txt.
  3. Review availability, structure, declared links, and the raw document.

Privacy & limitations

The public file is checked through TOEA’s API and is not saved. llms.txt is an emerging voluntary convention, not access control and not a guarantee of AI-system behavior.

Related tools

AI Crawler CheckerRobots.txt CheckerSitemap

Frequently asked questions

Is llms.txt required?

No. It is optional and should complement, not replace, normal accessible documentation and crawler controls.

Does this test robots.txt too?

No. Use the Robots.txt or AI Crawler Checker for crawler directives.

Where does llms.txt go?

At the root of the site, as /llms.txt, served as plain text or Markdown. The checker looks there unless you give it a direct URL.

Do AI assistants actually read llms.txt?

Some tools and documentation platforms do, but no major AI provider has committed to it. Treat it as a low-cost aid, not a guarantee of how a model will use your site.

Free tool · runs on toea's server · no account required