fourcents/seo
Free tool · no sign-up

Free SEO and AI-readiness audit

Enter any page. We fetch it the way a crawler does and run 45 checks: indexability, titles and descriptions, canonicals, speed signals, structured data and rich-result eligibility, AI-crawler access, llms.txt, sitemap, and whether the page opens with a quotable answer.

45 checks · about 20 seconds · no email required · nothing installed

What the audit checks

AreaChecks
TechnicalHTTPS, redirects, TTFB, compression, HSTS, HTML weight, noindex, canonical, viewport, hreflang, render-blocking scripts, image sizing and lazy loading, robots.txt, sitemap
On-pageTitle and meta description length and presence, H1 count, heading order, image alt text, internal links, Open Graph, favicon, language
ContentWord count, text-to-HTML ratio, outbound citations
Rich results & schemaJSON-LD validity, types present, BreadcrumbList, Organization/LocalBusiness, deprecated FAQ/HowTo reliance, Article dates
AI-search readinessAccess for OAI-SearchBot, ChatGPT-User, GPTBot, PerplexityBot, ClaudeBot and Google-Extended; llms.txt; answer-first opening; question-form headings; freshness and author signals

What it does not check

Field Core Web Vitals (LCP, INP, CLS), backlinks and keyword rankings need paid data and a crawl of the whole site. They are in the full audit, which is free with any plan or $1,800 on its own.

Privacy

We fetch the URL once and cache the result for an hour. We log the URL and score to improve the tool. Nothing is installed on your site and no email is required to see the results.

Want the full picture?

The full audit adds Core Web Vitals field data, a whole-site crawl, backlinks, keyword gaps and a 90-day plan.

Free auditBook a call