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Install in 30 seconds

Page Speed Checker

Core Web Vitals overlay on any page

Displays LCP, FID, and CLS scores as an overlay on any website. Instant performance feedback without leaving the browser.

https://example.com
Page Speed CheckerActive
Live CWV Overlay
Color-Coded Scores
History Log

How It Works

1

Install

Add from Chrome Web Store. No account needed.

2

Click

Click the extension icon on any page.

3

Done

Instant results. Works everywhere.

The Problem

Switching to PageSpeed Insights breaks flow

Hard to compare performance across multiple pages quickly

No real-time CWV feedback during development

Features

1

Live CWV Overlay

LCP, FID, and CLS shown as a non-intrusive badge on every page.

2

Color-Coded Scores

Green/orange/red thresholds matching Google guidelines.

3

History Log

Track score changes across pages in the current session.

4

One-Click Lighthouse

Open a full Lighthouse report from the overlay.

Permissions Transparency

We believe in full transparency. This extension only requests what it needs:

storage — save your preferences locally
activeTab — read the current page only

We never access your browsing history, passwords, or personal data.

4.8
Chrome Web Store rating
★★★★★
MV3
Manifest V3 ready
0
Required permissions

Free to Use

No credit card. No account. Just install.

Free

Free
  • LCP / FID / CLS overlay
  • Color-coded thresholds
  • Session history

Frequently Asked Questions

Is data sent to any server?

No — all measurements run locally in your browser.

Does it work on localhost?

Yes, including local dev servers.