Core Web Vitals Checker

Check your Core Web Vitals scores: LCP, INP, CLS. See exactly what's slowing your site and how to fix it. 50 SEO agents included.

50 specialized AI agents

Our scanner covers all 4 pillars (SEO, AEO, GEO, ISO) in a single scan — 175 AI agents total

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Core Web Vitals are Google's page experience signals that directly impact your search rankings. Our scanner checks your Largest Contentful Paint (LCP), Interaction to Next Paint (INP), and Cumulative Layout Shift (CLS) alongside the technical factors that cause poor scores.

What Our SEO Agents Check

Largest Contentful Paint (LCP) — main content load time
Interaction to Next Paint (INP) — responsiveness to user input
Cumulative Layout Shift (CLS) — visual stability of the page
Render-blocking resources — CSS and JS that delay paint
Image optimization — proper sizing, lazy loading, formats
Font loading — FOUT/FOIT prevention, font-display usage
Third-party script impact — analytics, ads, widgets overhead
Server response time (TTFB) — hosting performance
DOM size — excessive elements slowing rendering
JavaScript execution — long tasks blocking the main thread

Why SEO Matters

Google confirmed Core Web Vitals as a ranking signal in 2021. Pages that pass all three CWV metrics rank higher and get more traffic. More importantly, users abandon pages that load slowly — 53% of mobile users leave if a page takes over 3 seconds to load.

Frequently Asked Questions

What are good Core Web Vitals scores?

Good: LCP < 2.5s, INP < 200ms, CLS < 0.1. Needs Improvement: LCP 2.5-4s, INP 200-500ms, CLS 0.1-0.25. Poor: LCP > 4s, INP > 500ms, CLS > 0.25.

How much do Core Web Vitals affect rankings?

CWV is a tiebreaker signal — it won't override great content but it WILL determine winners among pages with similar relevance and authority. In competitive niches, CWV often decides who ranks #1 vs #5.

Can you fix my Core Web Vitals?

Our scan identifies exactly what's causing poor CWV scores and provides specific fixes. For implementation, click "Fix It For Me" in your report to have our engineering team resolve the issues.

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