LCP: Good ≤2.5s, Poor >4s. CLS: Good ≤0.1, Poor >0.25. INP: Good ≤200ms, Poor >500ms.

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Core Web Vitals JSON Analyzer

Parse Lighthouse output for CWV scores

LCP (seconds)

CLS

INP (ms)

FCP (seconds)

TTFB (seconds)

Speed Index

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Calculate percentages, increases, decreases & more

Calculate exact age in years, months, days, hours

Body Mass Index — metric and imperial

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CWV analyzer