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Indexly LLMs.txt Checker
Free llms.txt content validator — checks spec compliance and crawlability.
Free tier: fully free validator
What it does well
- Completely free to use with no account or signup required.
- Validates both live URLs and pasted file content for flexibility.
- Provides clear, specific feedback on syntax errors within the file.
Where it falls short
- Single-purpose tool; offers no other SEO or site monitoring features.
- Provides no automated or scheduled monitoring; checks are entirely manual.
- Does not store history or track changes to the file over time.
Alternatives to Indexly LLMs.txt Checker
Free llms.txt deep analyzer — section-by-section, link extraction, quality score.
Free llms.txt format / live / crawlable check.
isitagentready.com
freeFree agent-readiness scanner from Cloudflare — score + AI-coding-agent fix prompts.
LLMclicks AI Website Analyzer
freemiumFree site-wide AI readiness check — bundled with LLMclicks paid GEO analytics product.