Core Web Vitals checker
Rate your Largest Contentful Paint, Interaction to Next Paint and Layout Shift against Google’s thresholds.
How it works
Each metric is good, needs work or poor. A page passes when LCP, INP and CLS are all good at the 75th percentile of real visits.
Questions
Do lab tests count?
Google uses real visits from Chrome users. Lab tests help find problems but aren’t the score.
Where do I get my numbers?
From real-user monitoring in your app, or Chrome’s field data.