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Core Web Vitals Analyzer

Analyze real user experience and Lighthouse performance using Google PageSpeed Insights.

About the Core Web Vitals Analyzer

The Core Web Vitals Analyzer runs your pages through Google PageSpeed Insights and explains the results: Largest Contentful Paint, Interaction to Next Paint, and Cumulative Layout Shift, with the fixes that move each metric.

Core Web Vitals are a ranking signal, a conversion lever, and a crawlability gate — pages that load poorly get fetched less and cited less. This tool turns lab and field data into a prioritized fix list instead of a wall of numbers.

A Pro-plan feature. Start with your templates and money pages, fix layout-wide issues first, then re-test.

Frequently asked questions

What are Core Web Vitals?▾
Core Web Vitals are Google's user-experience metrics: LCP (loading), INP (interactivity), and CLS (visual stability). Thresholds: LCP under 2.5s, INP under 200ms, CLS under 0.1 for a good rating.
Do Core Web Vitals affect SEO?▾
Yes — page experience is a ranking signal, and slow pages convert worse and waste crawl budget. They also gate AI retrieval: pages that time out for bots cannot be cited.
What is the difference between lab and field data?▾
Lab data is a controlled test run; field data (CrUX) reflects real users. Optimize against field data where available and use lab runs to diagnose specific fixes.
What usually causes poor INP?▾
Heavy JavaScript execution blocking the main thread — large bundles, long tasks, and third-party scripts. Code-split, defer non-critical scripts, and break up long tasks.

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