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Free AI search & LLM visibility Tools

AI crawler access, llms.txt and answer-readiness. 5 free tools, no sign-up.

AI Crawler Access Checker Test your robots.txt against 20+ AI crawlers and AI search bots, with training crawlers and search or retrieval bots shown separately. Live check AI Search Readiness Checker Get a heuristic check of how easily AI search systems can access, extract and attribute a page, with clear steps to improve it. Live check llms.txt Generator Build an llms.txt file in the proposed Markdown format, with your site summary and key links grouped into sections, then download it. In your browser llms.txt Validator Fetch your live /llms.txt or paste a draft to check its H1, summary, sections and Markdown links against the proposed format. Live check Semantic HTML Checker Check whether a page uses semantic HTML landmarks, headings, lists, tables and figures that help AI systems, search engines and screen readers. Live check

About ai search & llm visibility tools

AI assistants and AI search features such as ChatGPT search, Perplexity, Claude and Google's AI experiences can only cite pages they can reach and understand. These tools help with the parts you control: whether AI crawlers are allowed by your robots.txt, whether your content is served as readable HTML with a clear structure, and whether you publish an optional llms.txt file.

Start with the AI crawler access checker to see which bots your robots.txt allows or blocks, separating training crawlers from AI search bots. Then run the AI search readiness checker on a key page for a heuristic review of structure, authorship and schema. No tool can promise citations in AI answers; these checks simply remove technical barriers and make your content easier to extract and attribute.

Frequently asked questions

What is AI search optimization (GEO or AEO)?

AI search optimization, also called generative engine optimization (GEO) or answer engine optimization (AEO), means making your content easy for AI systems to access, understand and cite. In practice it overlaps heavily with good SEO: crawlable pages, clear structure, direct answers, accurate facts and visible authorship. No platform publishes a ranking formula for AI answers, so treat any score as a guide.

Should I block AI crawlers in robots.txt?

It depends on your goals. Blocking training crawlers such as GPTBot or CCBot may keep your content out of future model training, while blocking AI search bots such as OAI-SearchBot or PerplexityBot may stop your pages being cited in those products. Many sites allow search bots and decide case by case on training bots. robots.txt is a request, not an enforcement mechanism.

Do I need an llms.txt file?

No. llms.txt is a community proposal from llmstxt.org that offers AI tools a Markdown summary of your key pages. No major search engine has said it uses llms.txt for ranking, so it is optional. It is quick to create and harmless, which is why some sites publish one, but it should not take priority over crawlability and content quality.