Web Vitals Checker
Measure Core Web Vitals of your website. Check LCP, FID, CLS, and other performance metrics.
Web Vitals Checker
This tool measures Core Web Vitals for the current page. Reload the page and wait a few seconds for accurate measurements.
LCP (Largest Contentful Paint)
FID (First Input Delay)
CLS (Cumulative Layout Shift)
FCP (First Contentful Paint)
TTFB (Time to First Byte)
Introduction
The Web Vitals Checker tool measures Core Web Vitals metrics like LCP, FID, and CLS for your pages. It helps you understand real‑world performance and prioritize optimizations.
When to use this tool
Use this tool whenever you optimize page speed or UX: after design changes, before launches, or when investigating slow user experiences.
How to use
Open the target page in the tool
Load or reference the page you want to test so the tool can measure its performance metrics.
Collect Web Vitals metrics
Observe key values such as Largest Contentful Paint, First Input Delay, and Cumulative Layout Shift.
Interpret the results
Compare metrics against recommended thresholds to decide whether your page needs optimization.
Examples
Validating a new homepage design
Measure Web Vitals after redesigning your homepage to ensure animations and images do not hurt performance.
FAQ
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