Free SEO Audit — SEO, AI visibility, accessibility, HTML & security

An audit that shows what crawlers actually see

Most SEO checkers screenshot your page in a full browser and grade the pretty version. This audit does the opposite, deliberately: it fetches the raw HTML exactly the way Googlebot, GPTBot, and ClaudeBot do — no JavaScript execution — and grades that. If your content only exists after JavaScript runs, you'll see it here first, because to most crawlers your page is the empty shell, not the finished site.

The six areas it scores

• SEO — title and description quality, canonicals, heading structure, image alt coverage, structured data (validated against Google's required properties), robots.txt, sitemap discovery, redirect chains, and readability.
• AI visibility — the new organic channel. Can ChatGPT, Claude, Perplexity, and Gemini crawl the page? Is there an llms.txt? Is the content machine-readable, with authors and dates AI assistants trust enough to cite?
• HTML quality — duplicate ids that break anchors and forms, obsolete tags, mixed content, missing dimensions that cause layout shift, and a live test of the page's internal links.
• Accessibility — a full pass with axe-core, the same engine behind browser devtools and professional auditors: alt text, form labels, ARIA correctness, heading order, landmarks, and table semantics.
• Security — HTTPS and HSTS, Content-Security-Policy, clickjacking protection, cookie flags, and version disclosure that maps your stack for attackers.
• Performance — server response time, compression, render-blocking resources, and — when Google has data for your page — real-user Core Web Vitals, the metrics that feed directly into rankings.

It doesn't stop at one page

Most free checkers grade a single URL and call it done. This one then crawls a sample of your internal links and analyses them together — catching site-wide problems that only show up across pages: duplicate or missing titles and descriptions, pages accidentally set to noindex, broken internal links, and thin content. That's the difference between a spot-check and an audit, and it's why a run takes a proper 20–40 seconds rather than a fraction of a second.

Built to be trusted

Every finding shows its evidence — the actual tag, header, or URL it found — and explains the fix in plain language. Scoring is transparent: each area starts at 100 and loses points per issue found, weighted by severity. No mystery grades, no "unlock the real problems" upsell. The passed checks are listed too, so you know what was verified, not just what failed.

Why AI visibility is in an SEO audit

Search is splitting in two. Classic rankings still matter, but a growing share of buying research now happens inside AI assistants — and they have their own crawlers, their own rules, and their own failure modes. A robots.txt line written years ago may be silently removing you from every ChatGPT answer in your category. This audit checks all major AI crawlers by name, so that decision is at least a conscious one.