Core Web Vitals Checker: measure LCP, CLS & INP
Paste any URL and run a focused Core Web Vitals check. See how fast your largest element loads, how stable your layout is and how responsive interactions feel — with clear fixes for each metric.
Free account required · 1 free check every 24 hours
What our Core Web Vitals checker tests
The check runs the same Core Web Vitals category from our full audit and breaks down the three metrics Google cares about most.
Largest Contentful Paint (LCP)
Measures how long the largest visible element takes to render. We estimate it from server response time and page weight, then tell you how to get under 2.5 seconds.
Cumulative Layout Shift (CLS)
Detects images, ads and embeds without reserved width/height that make the page jump while loading. We flag missing dimensions so you can lock the layout in place.
Interaction to Next Paint (INP)
Estimates how responsive your page feels by counting blocking scripts and external requests. We recommend deferring or removing the scripts that slow interactions.
Why check Core Web Vitals?
Google ranking signal
Core Web Vitals are part of Google's page experience update. Better scores can help you outrank slower competitors.
Higher conversions
Faster, more stable pages keep visitors engaged. Even a one-second delay can reduce conversion rates.
Actionable fixes
We don't just show numbers. Every metric comes with a clear explanation and the exact step to improve it.
How the check works
Enter your URL
We fetch the page and measure response time, weight and markup stability.
Score each metric
LCP, CLS and INP are scored green, amber or red against Google's thresholds.
Fix and re-check
Follow the step-by-step fixes, then run the Core Web Vitals checker again.
Get the full picture with a complete audit
A Core Web Vitals check is just one category. Run the full website audit for SEO, security, accessibility, broken links and more — all exported to a PDF.