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Web Vitals Monitor

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Overview

Monitor Core Web Vitals (FCP, LCP, CLS, INP) in real time

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.

Details

  • Version
    1.0.0
  • Updated
    April 3, 2026
  • Offered by
    Lepus
  • Size
    26.94KiB
  • Languages
    English (United States)
  • Developer
    Email
    lepusorion@gmail.com
  • Non-trader
    This developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.

Privacy

Manage extensions and learn how they're being used in your organization
The developer has disclosed that it will not collect or use your data.

This developer declares that your data is

  • Not being sold to third parties, outside of the approved use cases
  • Not being used or transferred for purposes that are unrelated to the item's core functionality
  • Not being used or transferred to determine creditworthiness or for lending purposes

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