Site Checker

by 321enterprise

321enterprise.com →

Can search engines and AI assistants read, understand, and trust your site?

Enter a domain. We fetch your public pages like the major crawlers do — GPTBot, ClaudeBot, PerplexityBot, Googlebot, Bingbot and others — then check whether your site is crawlable, understandable, fast, secure, and ready for search and AI answers. No login, no cookies, no private data.

“Check site” is fast. “Deep scan” adds Core Web Vitals from the Google PageSpeed Insights API and samples internal pages — it can take up to a minute. · Compare two sites

Anonymous & public. We only read your public pages — no login, no cookies, nothing private. Deep scan sends just your public URL to Google’s PageSpeed Insights API.
What we check — and what we don’t

Everything below is read from your site’s public pages only — the same content any visitor or search engine can already see. We never log in, submit forms, or touch private data. Here’s the full list, grouped by what it affects.

🤖 AI & search crawler access
Whether each major crawler can reach your page — GPTBot, OAI-SearchBot, ClaudeBot, PerplexityBot, Googlebot, Bingbot and ~16 others · robots.txt allow/deny rules · cloaking (are bots shown the same page as people?) · llms.txt presence.
🔎 Crawlability & indexing
HTTPS & certificate validity · http→https redirect · www vs non-www consistency · XML sitemap · noindex signals (meta & X-Robots-Tag header) · canonical URL · JavaScript-rendering gap.
📝 On-page & metadata
Page title & meta description · Open Graph / social tags · language & viewport · heading structure & question-style headings · image alt-text coverage · favicon & feed.
🧩 Structured data AI answers
JSON-LD schema · LocalBusiness markup · name / address / phone (NAP) consistency for local businesses.
⚡ Performance Deep scan
Core Web Vitals & a performance score via the Google PageSpeed Insights API, plus a rendered screenshot of your page.
🔒 Security & hygiene
Security response headers · mixed (insecure) content · cross-domain canonical issues.

The score rings are transparent 0–100 readiness signals, not guarantees of ranking: Crawlability (share of crawlers that can reach the page; redirects count as reachable), Technical Health (HTTPS/TLS, http→https, sitemap), Content readiness (title, headings, readable text in raw HTML), and on Deep scan Performance & Accessibility (Google Lighthouse — automated checks only).