Updated weekly with real Chrome user data

Never Miss a Core Web Vitals Change

Get instant performance reports and schedule weekly or monthly updates straight to your inbox. Track your CWV scores over time — powered by the same data Google uses to rank your site.

e.g. https://www.example.com — Works with any site that has Chrome traffic data

A free tool from Vital Signs Tracker, the Core Web Vitals monitoring platform built by WP Speed Fix.

What you'll see in your report

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Historical Trends

40 weeks of weekly data points for LCP, INP, and CLS. See exactly when performance improved or degraded.

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Pass/Fail Assessment

Instant visual status showing whether your site passes Google's Core Web Vitals thresholds at the 75th percentile.

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Homepage vs. Origin

Compare your homepage performance against your site-wide average. See if specific pages are dragging you down.

This report shows Google's average. Vital Signs Tracker shows every visit.

Google's Chrome UX Report is a 28-day rolling score for the whole site or its busiest pages, and it has no data at all for smaller sites. Vital Signs Tracker measures Core Web Vitals on every visit, so you can see which page is slow and why.

Every page, including cart, checkout and account pages Google never reports
Split by traffic source, country, device and logged-in users, so you can see how your Google Ads landing pages really perform
The cause, not just the score: the element behind a slow LCP, the interaction behind a slow INP, the shift behind a bad CLS
Daily data and scheduled email reports for you and your clients, from $29 a month

See Vital Signs Tracker Use this report in Claude, ChatGPT or Cursor

Core Web Vitals Report

www.example.com

Data through March 1, 2026 Passing CWV Top 5,000 site CrUX Popularity RankGoogle ranks origins by traffic volume into buckets: top 1K, 5K, 10K, 50K, 100K, 500K, 1M and 10M. This site falls in the top 5,000 most-visited origins in the Chrome UX Report dataset.

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Homepage-specific data is available for this site. Your homepage has enough Chrome user traffic to generate its own scores — and they can differ significantly from the site-wide average shown above. Individual pages often perform very differently to the site average.

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You're viewing homepage-only scores. These scores reflect Chrome user data for your homepage URL specifically — they may differ from the site-wide average across all pages.

Core Web Vitals CWV

Largest Contentful Paint Largest Contentful Paint (LCP)Measures how long it takes for the largest visible element (image, heading, or text block) to finish rendering. This is the best proxy for perceived load speed — when users feel the page has "loaded".Good: ≤ 2.5s · Needs Improvement: 2.5–4.0s · Poor: > 4.0s Good

1.8s

75th percentile · Target: ≤ 2.5s

82% good 12% needs improvement 6% poor

Improved 320ms over 6 months

Interaction to Next Paint Interaction to Next Paint (INP)Measures the worst-case delay between a user interaction (click, tap, or keypress) and the next visual update. A low INP means the site feels snappy and responsive to every interaction.Good: ≤ 200ms · Needs Improvement: 200–500ms · Poor: > 500ms Good

128ms

75th percentile · Target: ≤ 200ms

89% good 8% needs improvement 3% poor

Improved 42ms over 6 months

Cumulative Layout Shift Cumulative Layout Shift (CLS)Measures unexpected visual movement of page content. A high CLS means elements are shifting around as the page loads — like a button moving just as you try to tap it. Common causes: images without dimensions, late-loading ads, and web fonts.Good: ≤ 0.1 · Needs Improvement: 0.1–0.25 · Poor: > 0.25 Needs Work

0.12

75th percentile · Target: ≤ 0.1

68% good 22% needs improvement 10% poor

Worsened by 0.03 over 6 months

Diagnostic Metrics

Time to First Byte Time to First Byte (TTFB)Measures the time from the user's request to the first byte of the server response. A slow TTFB indicates server-side issues — slow database queries, lack of caching, or distant hosting. It directly impacts every metric that follows.Good: ≤ 800ms · Needs Improvement: 800–1800ms · Poor: > 1800ms Good

420ms

75th percentile · Target: ≤ 800ms

78% good 16% needs improvement 6% poor

Improved 130ms over 6 months

First Contentful Paint First Contentful Paint (FCP)Measures when the first text or image becomes visible. FCP is the user's first visual feedback that the page is loading. A fast FCP reassures users that something is happening, even before the full page renders.Good: ≤ 1.8s · Needs Improvement: 1.8–3.0s · Poor: > 3.0s Good

1.2s

75th percentile · Target: ≤ 1.8s

84% good 11% needs improvement 5% poor

Improved 400ms over 6 months

Core Web Vitals Trends

The three metrics Google uses to assess your site's user experience. 75th percentile values over ~10 months, updated weekly.

Largest Contentful Paint (LCP)

Good ≤ 2.5s Needs Improvement Poor > 4.0s

Interaction to Next Paint (INP)

Good ≤ 200ms Needs Improvement Poor > 500ms

Cumulative Layout Shift (CLS)

Good ≤ 0.1 Needs Improvement Poor > 0.25

Diagnostic Metrics

These aren't part of Google's Core Web Vitals assessment, but they're critical for diagnosing performance issues and understanding what's driving your CWV scores.

Time to First Byte (TTFB)

Good ≤ 800ms Needs Improvement Poor > 1800ms

First Contentful Paint (FCP)

Good ≤ 1.8s Needs Improvement Poor > 3.0s

This free report is built by Vital Signs Tracker. The full version tracks every visit and shows which pages, devices, countries and traffic sources are behind these scores.

See Vital Signs Tracker

Never Miss a Core Web Vitals Change

Historical Trends

Pass/Fail Assessment

Homepage vs. Origin

This report shows Google's average. Vital Signs Tracker shows every visit.

No Data Available

Core Web Vitals Report

Passing Core Web Vitals Assessment

12-Week Speed History

Core Web Vitals Trends

Diagnostic Metrics

Never Miss a Core Web Vitals Change

Historical Trends

Pass/Fail Assessment

Homepage vs. Origin

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This report shows Google's average. Vital Signs Tracker shows every visit.

No Data Available

Passing Core Web Vitals Assessment

12-Week Speed History

Core Web Vitals Trends

Diagnostic Metrics

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