Methodology, limitations & disclaimer

What we check

SEO fundamentals (custom engine). We fetch your page's raw HTML exactly like a crawler (no JavaScript execution) and check: title and meta description presence and length, H1 and heading hierarchy, canonical URL, indexability (meta robots), robots.txt, XML sitemap, Open Graph and Twitter card tags, schema.org JSON-LD structured data, image alt-text coverage, language declaration, mobile viewport, HTTPS and mixed content. The SEO score is a weighted average of these checks; checks that could not run are excluded from the score and flagged, never guessed.

Performance (Google data). Performance, Core Web Vitals and the Lighthouse SEO / Accessibility / Best-Practices scores come directly from the Google PageSpeed Insights API, the same engine behind Chrome DevTools. Where Google has real-user field data (CrUX) we show it and label it as such; otherwise we show lab data and label it as lab. Lighthouse results naturally vary a few points between runs.

Accessibility. Two layers: our static checks (lang attribute, alt attributes, form labels, empty links/buttons, landmarks, skip link — heuristics on raw HTML) plus the Lighthouse accessibility audit (including real color-contrast measurement in a rendered browser).

AI-Readiness (0–100). Our own composite score measuring how much of your site an AI assistant can actually read. Points: content readable without JavaScript (30), robots.txt access for GPTBot / ClaudeBot / Google-Extended / PerplexityBot / CCBot (15), structured data (15), llms.txt (10), semantic HTML structure (10), title/description/social meta (10), sitemap (5), canonical (5). llms.txt is an emerging convention (llmstxt.org), not yet a formal standard — we treat it as a bonus signal.

Overall score. 25% mobile performance + 25% AI-Readiness + 20% SEO (average of the Lighthouse SEO score and our custom SEO score) + 20% Lighthouse accessibility + 10% best practices. If the Lighthouse portion fails, we show a clearly-labeled partial score instead.

What an automated audit cannot check

We would rather tell you this upfront than let a number mislead you. This tool cannot verify:

· Content quality and relevance — whether your copy convinces anyone, targets the right keywords, or answers real search intent.
· Rankings and traffic — we do not know your Google positions, impressions or visitors.
· Backlinks and authority — no link-graph data.
· Full WCAG conformance — automated tools catch only roughly a third of accessibility barriers. Keyboard flows, screen-reader experience, cognitive load and meaningful alt text need human testing.
· Legal compliance of any kind — GDPR, cookie consent, EAA/ADA, imprint requirements. We may detect technical artifacts, but compliance is a legal judgment.
· Security — this is not a penetration test or vulnerability scan.
· Pages behind logins, paywalls or geo-blocks, and sites that block our fetcher (we audit one public page per run, plus robots.txt / sitemap / llms.txt).
· JavaScript-rendered content — deliberately: we measure what crawlers without JS see. Your human visitors may see more; that gap is exactly what the AI-Readiness score expresses.
· Conversion, UX and business outcomes — a 95/100 site can still sell nothing.
· How specific AI models actually use your content — we measure technical readability signals, not inclusion in any AI index or answer.

Disclaimer

This automated audit is provided free of charge, for informational purposes only. Results are generated by software without human review and reflect a point-in-time analysis of publicly accessible parts of the submitted URL. The audit does not constitute legal, regulatory, accessibility, security or professional advice, and it does not certify or guarantee compliance with WCAG, the European Accessibility Act (EAA), the ADA, GDPR or any other standard, directive or law. Automated tools detect only a subset of potential issues; a complete assessment requires manual expert review, testing with real users and assistive technologies, and for compliance questions, qualified legal counsel. Scores are estimates derived from third-party data (including Google PageSpeed Insights / Lighthouse) and heuristics, may vary between runs, and may be incomplete if a target site blocks automated access. Use of this tool is at your own risk; no warranty of any kind is given. We are not affiliated with Google, OpenAI, Anthropic or Perplexity; product names are used solely to describe crawler behavior.

Privacy

We store anonymous, aggregated usage counters (audits per day, audited domain names, category scores). If you request the PDF report, your email address and the audited URL are stored via Netlify Forms so the report can be delivered and occasional product updates sent; unsubscribe anytime by replying. We do not sell data. Audited pages are fetched transiently and not archived.

Who built this

Claudiu Hadarean : 15+ years in software development, Project Management and Company administration. SiteReadable is an independent project. If you want a deeper, human-reviewed audit, a prioritized remediation plan, or help shipping the fixes, get in touch I take on a limited number of consulting projects. Check my LinkedIn profile.