Core Web Vitals Checker

Check LCP, INP, and CLS for a single URL using field data when available.

Page URL

Enter a URL to run a Core Web Vitals check.

DeviceMobile is recommended because mobile CWV issues are often more visible.

Data handling

Field data is preferred. Lab data is used only when field data is limited or unavailable.

Free public checks are limited to 3 uses/day. CAPTCHA may appear for protection.Remaining today: 3

Results

Not run yet

CWV-focused result only. Full diagnostics belong in Page Speed Insight Checker.

Not run

WNo target selectedMobile

LCP—

INP—

CLS—

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Runtime—

Last run: —

Enter a URL, choose Mobile or Desktop, and analyze LCP, INP, and CLS.