AI Website Audit Tool.

Drop in a URL. Get a Claude-written site audit in 20 seconds.

LiveNext.jsClaude APIPlaywrightPageSpeed APIVercel

Free site audit tool. Eight quality dimensions. Claude-written analysis. No signup, no email gate.

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Demo · Try it

See it in action.

https://site-audit-eosin.vercel.app

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This is the actual live tool, embedded. Try it.

I · About

I built this because most site-audit tools either push you into a sales funnel or hand you a 200-row CSV that nobody reads. This one runs in 20 seconds, scores eight dimensions, and writes plain-English fixes. It uses the Google PageSpeed API for performance metrics and the Claude API for everything that requires reasoning.

II · How it works

The pipeline.

01User submits any URL through the input field
02Server scrapes the homepage HTML and screenshots it via Playwright
03Google PageSpeed Insights API runs on the URL for performance metrics
04Claude API analyzes eight dimensions in parallel: speed, mobile, SEO, content, trust, accessibility, security, social
05Structured JSON output is rendered as a report with prioritized fix recommendations

III · Sample

Sample Claude prompt for the SEO dimension.

const seoAudit = await claude.messages.create({
  model: "claude-sonnet-4-6",
  max_tokens: 2000,
  system: "You are a senior SEO auditor. Score 0-100. Output JSON only.",
  messages: [{
    role: "user",
    content: [
      { type: "text", text: `URL: ${url}\nHTML: ${html}` },
      { type: "text", text: `Score these signals:
        - title length + uniqueness
        - meta description quality
        - heading hierarchy (h1 -> h6)
        - canonical + robots tags
        - structured data (JSON-LD)
        - alt text coverage on images
        - internal link density
        - core web vitals (from PageSpeed)`}
    ]
  }],
  response_format: { type: "json_schema", schema: SEO_SCHEMA }
});