PageSpeed Insights Check: Core Web Vitals

PageSpeed Insights Checker

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This tool runs a URL through Google's PageSpeed Insights, which uses Lighthouse for a lab test and, where available, real-user Chrome data.

What you get

• Performance score for mobile and desktop
• Core Web Vitals such as Largest Contentful Paint, Interaction to Next Paint and Cumulative Layout Shift
• Suggested fixes, ordered by impact

How to read it

Field data from real users matters more than a single lab score, and scores can move a few points between runs. Start with the biggest wins: oversized images, render-blocking scripts and slow server response times.