Page Speed & Core Web Vitals

Measure Core Web Vitals (LCP, CLS, INP) and diagnose what's hurting your page speed.

As of June 2026, Page Speed & Core Web Vitals has 13 users in the Productivity category.

Productivity

Chrome Web Store ↗.crx

Users+225.0%

Rating0%

—

— reviews

Reviews0%

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Version

2.0.0

Manifest V3

90-day change · In the last 90 days this extension 1 version update, changed permissions.

History

9 snapshots

Tracking since Apr 1, 2026.

View as table

Date	Users	Rating	Reviews	Version
Apr 1, 2026	4	—	—	1.0.1
Apr 10, 2026	3	—	—	1.0.1
Apr 20, 2026	6	—	—	1.0.1
Apr 25, 2026	6	—	—	2.0.0
May 9, 2026	5	—	—	2.0.0
May 14, 2026	6	—	—	2.0.0
May 20, 2026	5	—	—	2.0.0
May 26, 2026	6	—	—	2.0.0
Jun 8, 2026	7	—	—	2.0.0
Now	13	—	—	2.0.0

Changelog

Apr 20, 2026
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Apr 20, 2026

short_description

Measure Core Web Vitals (LCP, CLS, INP) for the current page using browser performance APIs.

Measure Core Web Vitals (LCP, CLS, INP) and diagnose what's hurting your page speed.

Permissions & access

Permissions: tabs
Host access: None declared

Screenshots

Page Speed & Core Web Vitals screenshot 1

About

Page Speed & Core Web Vitals is a lightweight Chrome extension that measures Core Web Vitals (LCP, CLS, INP) for the currently opened web page using browser performance APIs.

The extension works instantly without any login, account, or external service. All metrics are calculated locally in the browser and displayed in a clear visual format for easy understanding.

Features:
• Largest Contentful Paint (LCP)
• Cumulative Layout Shift (CLS)
• Interaction to Next Paint (INP)
• Real-time metrics for the current page
• No tracking, no sign-in, no data collection

This tool is useful for SEO professionals, developers, and website owners who want quick performance insights while browsing.