Are LLCrawler and LLM Check both really free?
Yes. Both tools run a free AI-visibility audit. LLCrawler is fully free with no signup and no paid gate on any feature. LLM Check is also free and even offers a Chrome extension for one-click checks.
Comparison
LLCrawler vs LLM Check
Two free tools that score how visible your site is to ChatGPT, Claude, and Perplexity. Here is the honest difference between them.
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The short answer
Both are free AI-visibility audits, so the choice comes down to depth versus convenience. Pick LLCrawler if you want a deeper multi-page crawl, ready-to-paste files (llms.txt and a JSON-LD schema kit), a shareable badge, an AI agent prompt to fix issues, and full English/Spanish support — all with no signup. Pick LLM Check if you want a Chrome extension to spot-check any site in one click as you browse, plus its AEO glossary and SEO-vs-answer-engine education.
Honest note: we build LLCrawler. We still think the answer above is fair. If you disagree, email us — we will update this page.
Feature comparison
| Feature | LLCrawler | LLM Check |
|---|---|---|
| What it does | Crawls your homepage plus up to 9 internal pages and scores AI-search visibility in ~30 seconds | Scores a site's AI visibility and explains why AI is not recommending it, with a focus on structured data |
| Pricing | Free — every feature, no paid gate | Free |
| Signup required | No — paste a URL and go | No — check your site directly |
| Time to first insight | ~30 seconds | Seconds, especially via the 1-click Chrome extension |
| What gets scored | 6 categories: structured data/JSON-LD, content structure, meta & social, performance/Lighthouse, AI readiness (llms.txt + robots directives for GPTBot/ClaudeBot/PerplexityBot/Google-Extended + JS dependency), and sitemap | AI visibility with a strong structured-data and schema emphasis; shows before/after example scores (42→78) |
| Coverage | Multi-page: homepage + up to 9 internal pages | Single page per check; the Chrome extension makes it easy to check many sites quickly |
| Best for | Developers and owners who want generated fixes, multi-page depth, and Spanish support | Marketers who want a browser extension to spot-check sites while browsing and learn AEO concepts |
| Output | Score + prioritized issues + fixes + generated llms.txt and JSON-LD kit + shareable badge + a Markdown agent prompt for ChatGPT/Claude; bilingual EN/ES | Score + reasons AI is not recommending you + what to fix, plus an AEO technical glossary |
When to pick which
Pick LLCrawler when…
- → You want a deep one-off audit that actually crawls multiple pages, not just the homepage.
- → You are a developer and want generated, ready-to-paste files — llms.txt and a JSON-LD schema kit — instead of just a list of problems.
- → You are prepping a site before launch and want a shareable badge plus a Markdown agent prompt to hand to ChatGPT or Claude for the fixes.
- → You want everything free with no signup and no paid tier holding back features.
- → You work in Spanish or serve a bilingual audience and need the full report in EN and ES.
Pick LLM Check when…
- → You want a Chrome extension so you can audit any site in one click while you browse, without pasting URLs.
- → You are a marketer who wants to quickly spot-check competitors and prospects as you come across them.
- → You want a built-in AEO technical glossary to learn the terminology as you go.
- → You like the Traditional SEO vs Answer Engine Optimization comparison to frame the work for your team.
- → You mainly care about structured-data and schema scoring and want a fast, single-page read on it.
Frequently asked questions
What is the main difference between them?
Depth versus convenience. LLCrawler does a deeper multi-page crawl (homepage + up to 9 internal pages) and generates ready-to-paste files like llms.txt and a JSON-LD kit. LLM Check shines with its Chrome extension that lets you check any site in one click while browsing.
Which one should I use to actually fix my site?
LLCrawler, if you want the fixes done for you. Besides listing issues, it generates a ready-to-paste llms.txt, a JSON-LD schema kit, and a Markdown agent prompt you can hand to ChatGPT or Claude to apply the changes. LLM Check tells you what to fix and teaches the concepts via its AEO glossary.
Does either tool support Spanish?
LLCrawler is fully bilingual — the entire report is available in English and Spanish. LLM Check is English-focused, so LLCrawler is the better choice if you work in Spanish or serve a bilingual audience.
Can I check sites other than my own?
Both can, but LLM Check is built for it: its Chrome extension analyzes whatever site you are viewing in one click, which is ideal for spot-checking competitors. With LLCrawler you paste any URL to run a deeper multi-page audit on it.
See how visible your site is to AI
Run a free LLCrawler audit — no signup, results in about 30 seconds, with generated files you can paste straight into your site.
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