Free SEO Checker
Audit any page in seconds — 25+ on-page, technical and structured-data checks, Core Web Vitals, and the thing other free SEO tools skip: whether ChatGPT, Claude and Perplexity can actually find and cite you. No signup, no email, no limits.
What this free SEO tool checks
Content & on-page SEO
Title tag and meta description length, H1 usage, heading hierarchy, content depth, image alt text and internal linking — the fundamentals every search engine reads first.
Technical SEO
HTTPS, HTTP status, redirect chains, noindex directives, canonical tags, mobile viewport, robots.txt, XML sitemap, HTML weight and server response time.
Social & structured data
Open Graph and Twitter card tags for share previews, plus JSON-LD schema validation — the markup that unlocks rich results.
AI search readiness (GEO)
Whether GPTBot, ClaudeBot, PerplexityBot, Google-Extended and Bingbot are allowed to crawl you, llms.txt support, and whether your content is shaped so AI answers can cite it.
Free SEO checker — FAQ
Is this SEO checker really free?+
Yes — completely free, no signup, no email, no credit card, no report limits. Paste a URL and get the full audit. It's built by Pinkerton AI, the anonymous AI platform, so no-tracking is kind of our thing.
What does this free SEO tool check?+
25+ checks across four areas: on-page content (title, meta description, headings, content depth, image alt text), technical SEO (HTTPS, indexability, canonical, viewport, robots.txt, sitemap, redirect chains, response time), social & structured data (Open Graph, Twitter cards, JSON-LD schema), and AI search readiness (whether GPTBot, ClaudeBot and PerplexityBot can crawl you, llms.txt, answer-shaped content). Core Web Vitals come from Google PageSpeed.
What is AI search readiness?+
A growing share of searches now happen inside ChatGPT, Perplexity, Claude and Google AI Overviews. Those engines can only cite your page if their crawlers are allowed in robots.txt and your content is structured so an AI can lift a clean answer from it. This tool checks both.
Do you store the pages I check?+
No. Our edge server only relays the page HTML to your browser (browsers can't fetch other sites directly), and the entire analysis runs locally in your browser. Nothing is saved, logged to a profile, or used for anything else.
How is the SEO score calculated?+
Every check has a weight based on how much it typically matters for ranking. Passed checks earn full weight, warnings earn half, failures earn none — the score is the percentage earned. 90+ is an A; below 55 means fundamental issues are holding the page back.
Found issues? Fix them in minutes.
Paste your report into Pinkerton AI chat and get rewritten title tags, meta descriptions, schema markup and a prioritized fix list — from an AI that answers without lectures.