SEO Auditor Tool
Audit any website's SEO, performance, and accessibility with Google Lighthouse scores, Core Web Vitals, and detailed on-page HTML analysis. Free, fast, and runs 100% in your browser.
Ranking well in search requires more than great content — technical SEO, page speed, and accessibility all factor into Google's algorithm. This auditor analyses any public URL through the Google PageSpeed Insights API, returning Lighthouse scores, Core Web Vitals metrics, security header status, and structured data validation in a single comprehensive report.
Feature Overview
| Feature | Details |
|---|---|
| Lighthouse scores | 4 categories |
| Core Web Vitals | FCP, LCP, TBT, CLS |
| Security headers | Full check |
| Structured data | Validated |
| Cost | Free |
Frequently Asked Questions
What metrics does it check?
Lighthouse scores (Performance, SEO, Accessibility, Best Practices), Core Web Vitals (FCP, LCP, TBT, CLS), security headers, meta tags, and structured data.
Does it use Google's API?
Yes. Real Lighthouse data from the Google PageSpeed Insights API — the same data you'd see in Chrome DevTools.
Can I audit any website?
Any publicly accessible URL can be audited. Internal or password-protected pages are not supported.