How to Build a Custom SEO Audit Tool with Web Scraping

SEO audit tools charge $50-200/month. Build your own for free.

What to Check

async function auditPage(url) {
  const res = await fetch(url);
  const html = await res.text();
  const $ = require("cheerio").load(html);

  return {
    url,
    statusCode: res.status,
    title: $("title").text(),
    titleLength: $("title").text().length,
    metaDescription: $("meta[name=description]").attr("content") || "MISSING",
    h1Count: $("h1").length,
    h1Text: $("h1").first().text(),
    imagesMissingAlt: $("img:not([alt])").length,
    totalImages: $("img").length,
    internalLinks: $("a[href^=/]").length,
    externalLinks: $("a[href^=http]").length,
    wordCount: $("body").text().split(/\\s+/).length,
    hasCanonical: !!$("link[rel=canonical]").length,
    hasRobotsMeta: !!$("meta[name=robots]").length,
    loadTime: Date.now() - startTime
  };
}

Checks Covered

• Title tag (present, length 50-60)
• Meta description (present, length 150-160)
• H1 tag (exactly one)
• Image alt tags
• Internal/external link ratio
• Canonical URL
• Robots meta
• Page speed
• Word count

Sell It as a Service

• One-time audit: $50-100
• Monthly monitoring: $100-200/mo
• Competitor comparison: $100-200

Resources

• SEO Audit Toolkit
• Google SERP Scraping
• 77 Free Scrapers

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