Core Web Vitals Checker
Check and understand your Core Web Vitals scores. Get actionable tips to improve LCP, INP, and CLS!
All Core Web Vitals Passed!
3/3 Core Web Vitals passing (LCP, INP, CLS)
Core Web Vitals (Affect Search Rankings)
LCP(Largest Contentful Paint)
Measures loading performance. Time until main content is visible.
s
Good: ≤2.5s | Poor: >4s
INP(Interaction to Next Paint)
Measures responsiveness. Latency of all user interactions.
ms
Good: ≤200ms | Poor: >500ms
CLS(Cumulative Layout Shift)
Measures visual stability. How much content shifts unexpectedly.
Good: ≤0.1 | Poor: >0.25
Other Performance Metrics
FID
First Input Delay
ms
TTFB
Time to First Byte
ms
FCP
First Contentful Paint
s
Improvement Tips
🎉 All metrics are looking great!
📊 Quick Reference
| Metric | Good | Needs Work | Poor |
|---|---|---|---|
| LCP | ≤2.5s | ≤4s | >4s |
| FID | ≤100ms | ≤300ms | >300ms |
| INP | ≤200ms | ≤500ms | >500ms |
| CLS | ≤0.1 | ≤0.25 | >0.25 |
Features
- All 6 Web Vitals
- LCP, INP, CLS (Core)
- FID, TTFB, FCP
- Status indicators
- Improvement tips
How to Use
- 1Enter your Web Vitals values
- 2See pass/fail status
- 3Get targeted improvement tips
- 4Work on red/orange metrics first
Frequently Asked Questions
What are Core Web Vitals?
LCP, INP, and CLS are the three main metrics Google uses to measure user experience. They affect rankings.
Where do I get my values?
Use PageSpeed Insights, Chrome DevTools, or web-vitals npm library.