Core Web Vitals Checker — Audit LCP, INP & CLS Scores
Audit Google Core Web Vitals thresholds including Largest Contentful Paint (LCP ≤2.5s), Interaction to Next Paint (INP ≤200ms), and Cumulative Layout Shift (CLS ≤0.1).
What is the Core Web Vitals Checker?
The Core Web Vitals Checker by CompleteSEOTools is an enterprise web performance optimization utility designed to accelerate rendering speed, minify code assets, generate caching directives, and achieve passing Google Core Web Vitals (LCP, INP, CLS) scores.
How to Use the Core Web Vitals Checker (Step-by-Step)
Input Data / Code
Enter your URL, performance metrics, or paste raw CSS/JS code.
Execute Engine
Calculate performance budgets, compress assets, or audit vitals in real time.
Apply Optimization
Deploy the minified code, preload directives, or caching rules to your server.
Why Website Speed & Core Web Vitals Matter for SEO
Google confirmed Page Experience and Core Web Vitals as direct ranking signals. Fast-loading websites with sub-2.5s LCP and sub-200ms INP experience lower bounce rates, higher dwell times, and superior organic conversion rates across mobile and desktop devices.
Frequently Asked Questions (FAQs)
Core Web Vitals are a set of real-world user experience metrics (LCP, INP, CLS) that Google uses as direct organic ranking signals.
A page passes if at least 75% of real-user visits record LCP ≤2.5s, INP ≤200ms, and CLS ≤0.1.