Core Web Vitals Checker
Audit your site against Google's essential user-experience thresholds. Measure loading speed (LCP), interactivity (FID/INP), and visual stability (CLS).
Simulating real-user viewport, measuring LCP, FID & CLS...
In progress
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HTTP OK
⏱ Total Duration:
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📦 Page Weight:
Score / 100
Loading Speed
Largest Contentful Paint (LCP)
Time taken to render the largest visible image or text block.
Goal: ≤ 2.5s
Interactivity
First Input Delay (FID)
Delay before the browser responds to a user's first click or tap.
Goal: ≤ 100ms
Visual Stability
Cumulative Layout Shift (CLS)
Unexpected movement of visual layout during page load.
Goal: ≤ 0.1
Server TTFB
First byte latency
First Contentful Paint
First DOM element
JavaScript Scripts
Script tags found
Images & Media
🛠️ Actionable Optimization Guide
Targeted actions to elevate your score into the green (90+ zone)
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