Free Tool

Core Web Vitals Badge Generator

Enter any URL — we pull real field data from Google PageSpeed Insights and show your LCP, CLS, and INP in seconds.

Check a URL

Uses Google PageSpeed Insights API · Field data requires ~5,000 monthly visitors · Lab data always available

Field Data vs Lab Data

Field Data (Real Users)

  • 75th percentile of real Chrome sessions
  • Sourced from CrUX dataset
  • What Google uses for rankings
  • Needs ~5,000 monthly visitors

Lab Data (Lighthouse)

  • Simulated on emulated device
  • Useful for debugging before/after
  • Does NOT directly affect rankings
  • Always available regardless of traffic

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