PageSpeed Score
Run Google Lighthouse checks with Core Web Vitals and category scores
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Free PageSpeed Score Checker — Lighthouse and Core Web Vitals
This free PageSpeed Score checker runs a real Google Lighthouse analysis through the official PageSpeed Insights API v5. It returns Performance, Accessibility, Best Practices, and SEO scores plus key metrics like LCP, CLS, INP, FCP, and TBT.
Use it to benchmark website speed, spot render-blocking assets, identify unused CSS/JavaScript, and compare mobile versus desktop results before shipping changes.
What this tool helps you optimize
- Core Web Vitals and real-user CrUX trends
- Render-blocking resources and front-end bottlenecks
- Unused JavaScript and CSS opportunities
- SEO and accessibility baseline before deployment
FAQ
Do I need an API key for PageSpeed Insights?
Not required for basic usage. For higher request limits in production, set PAGESPEED_API_KEY in your environment.
Why do scores differ between runs?
Lighthouse results can vary due to network conditions, server response time, page state, and third-party scripts. Run multiple tests and track trends.