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BrainScan Media

llms.txt Validator

Check your llms.txt structure and make your website’s guidance easier to follow.

Free llms.txt validation

Give your AI guidance a check.

Enter your domain or a direct llms.txt URL. We review the Markdown structure: your site title, optional summary, introductory information, and organized resource links.

Get line-specific errors, optional improvements, and a readable outline of the file. See exactly what was collected and how to fix formatting problems.

llms.txt is an optional proposal for providing guidance to language models. A valid file does not guarantee AI visibility, indexing, or citations.

A domain checks /llms.txt; a full URL checks that file, including subdirectories. HTTPS falls back to HTTP if unreachable. Files up to 128 KB.

Recently updated your website?

Results are cached for up to one hour to reduce repeated requests and help protect our tools from abuse. If you update your website or files after a check, you may still see the previous results. Please allow up to one hour, then run the check again.

Check Your AI SearchabilityFor metadata, indexing, and crawler guidance, use our AI Searchability Test.

A clearer guide to your website

Title & introduction

Check the required site title and review your optional summary and introductory details.

Resource organization

Validate H2 sections and named resource links, with optional descriptions that explain each destination.

Actionable corrections

Find formatting issues by line number, separate errors from suggestions, and inspect your parsed outline.

SEO & AI Searchability Services

Turn your checkup into a plan for better discovery.

BrainScanMedia offers technical SEO and AI searchability services, including structured data, crawlability improvements, content organization, and AI-readable resources such as llms.txt. Let us help make your website easier for search engines and AI systems to understand.

Explore SEO & AI Searchability