Core Web Vitals Checker

Measure Largest Contentful Paint (LCP), Cumulative Layout Shift (CLS), First Input Delay (FID), and TTFB performance metrics.

Popular examples: https://google.comhttps://github.com
LCP (Largest Contentful Paint)

Measures loading performance of the main visual content block (≤ 2.5s target).

FID / INP (Interactivity)

Evaluates page responsiveness to user input clicks (≤ 100ms target).

CLS (Layout Shift)

Measures unexpected visual layout movement (≤ 0.1 target).

Auditing Core Web Vitals and load performance...

LCP (Content Load)

0 s

Good: ≤ 2.5s
FID / INP (Interactivity)

0 ms

Good: ≤ 100ms
CLS (Visual Stability)

0.00

Good: ≤ 0.1
TTFB (Server Response)

0 ms

Good: ≤ 800ms
Overall Core Web Vitals Rating

Good

What are Google Core Web Vitals?

Core Web Vitals are standardized user experience metrics defined by Google that form part of Google's Page Experience ranking signal. Passing Core Web Vitals thresholds improves mobile search rankings and reduces bounce rates.

Frequently Asked Questions (FAQ)

LCP under 2.5 seconds is rated Good by Google.

Set explicit width and height attributes on images and video elements.

Yes, Core Web Vitals are an official Google search ranking signal.

Yes, 100% free with unlimited audits.

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