Free Core Web Vitals Checker

Measure your Core Web Vitals performance instantly. Check Largest Contentful Paint (LCP), First Input Delay (FID), and Cumulative Layout Shift (CLS) scores to see how Google evaluates your page experience and what to fix for better rankings.

Use This Tool Free → No signup required · Instant results

What You Get

Everything included, completely free. No hidden limits on the report.

✓ Largest Contentful Paint (LCP) measurement and grading
✓ First Input Delay (FID) / Interaction to Next Paint (INP) analysis
✓ Cumulative Layout Shift (CLS) score with element identification
✓ Pass/fail grading aligned with Google's thresholds
✓ Performance score breakdown with actionable tips
✓ Time to First Byte (TTFB) and server response check
✓ Render-blocking resource identification
✓ Mobile vs. desktop performance comparison
✓ Historical comparison to track improvement over time
✓ Shareable performance report for stakeholders

How It Works

Three simple steps to actionable insights.

1

Enter a URL

Paste any webpage URL into the tool. No account or login needed to get started.

2

Get Your Results

Our engine analyzes the page in seconds and delivers a detailed, easy-to-read report.

3

Take Action

Use the prioritized recommendations to fix issues and improve your rankings.

Frequently Asked Questions

Common questions about this tool answered.

What are Core Web Vitals?
Core Web Vitals are a set of three metrics defined by Google that measure real-world user experience on web pages: Largest Contentful Paint (loading), First Input Delay (interactivity), and Cumulative Layout Shift (visual stability). They are a confirmed Google ranking factor.
How do Core Web Vitals affect SEO?
Google uses Core Web Vitals as part of its page experience ranking signals. Pages that pass all three thresholds may receive a ranking boost, while poor scores can hurt your position in search results.
What is a good LCP score?
Google considers an LCP of 2.5 seconds or faster as good. Between 2.5 and 4 seconds needs improvement, and anything over 4 seconds is poor. Our tool shows exactly where your page lands and how to improve it.
How often should I check my Core Web Vitals?
Check after every major site update or deployment. For ongoing monitoring, a weekly or monthly check helps catch regressions early before they impact your rankings.
Can I check Core Web Vitals on mobile and desktop?
Yes. Our tool tests both mobile and desktop performance so you can see how your pages perform across devices and prioritize fixes accordingly.
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