Core Web Vitals Checker
Single-URL deep dive into LCP, CLS, INP and more — with the same data Google uses for search rankings.
Real Lighthouse data Mobile + desktop Live diagnostics
Powered by Google PageSpeed Insights. Audits typically take 15–45 seconds.
What it does
All web vitals
LCP, FCP, CLS, TBT, INP, TTI, Speed Index — with Good/Needs work/Poor labels.
Mobile + desktop
Switch strategies to see how your site behaves on slower mobile vs fast desktop.
Top opportunities
Ranked list of fixes with estimated millisecond savings, straight from Lighthouse.
Frequently Asked Questions
Quick answers about the Core Web Vitals checker.
Failing your Core Web Vitals? NETIUS can audit and optimize your site. Talk to NETIUS →