Web Vitals Monitor

Web Vitals Monitor gives you instant visibility into the four Core Web Vitals metrics that Google uses to evaluate page experience: ▸ FCP (First Contentful Paint) — How quickly the first content appears ▸ LCP (Largest Contentful Paint) — When the main content finishes loading ▸ CLS (Cumulative Layout Shift) — Visual stability of the page ▸ INP (Interaction to Next Paint) — Responsiveness to user input ★ Key Features: • Real-time monitoring on every page you visit • Color-coded ratings based on Google's official thresholds (Good / Needs Work / Poor) • Clean, minimal UI with progress bars • Auto-refreshing data — CLS and INP update as you interact • One-click page reload to re-measure • Zero configuration required • No data collection — 100% local, privacy-first ★ Rating Thresholds (Google Standards): • FCP: Good < 1.8s | Poor ≥ 3s • LCP: Good < 2.5s | Poor ≥ 4s • CLS: Good < 0.1 | Poor ≥ 0.25 • INP: Good < 200ms | Poor ≥ 500ms Perfect for web developers, SEO specialists, and performance engineers who need quick page performance checks without opening DevTools. Lightweight. Fast. No permissions abuse. Just the metrics you need.