What are Core Web Vitals today?

Google Core Web Vitals are LCP, INP, and CLS. Cool Web Tool centers those metrics and also shows supporting lab signals like TTFB and FCP when available.

What happened to FID?

Interaction to Next Paint (INP) replaced First Input Delay (FID) as the responsiveness Core Web Vital. We prioritize INP and may still surface related lab signals such as total blocking time where useful.

Is this lab data or real-user CrUX data?

Primary performance views use PageSpeed and SiteAudit lab metrics. When Chrome UX Report field data is available, we surface that context alongside lab results.

How is this different from a site audit?

Core Web Vitals and performance analytics focus on speed and responsiveness. A site audit crawls technical, content, security, and broader SEO issues across your site.

Can I check mobile and desktop separately?

Yes. Strategy toggles let you review mobile and desktop lab views so device-specific regressions stay visible.

How fresh is the performance data?

We show when metrics were measured and warn when data looks stale, so you are not optimizing on outdated scores.

What can I do on the free plan?

Free and paid tiers include performance and CWV access with plan-based limits. Start free, then upgrade when you need higher volume or deeper workflows.

How can I improve my CLS score?

Common fixes include setting image dimensions, reserving space for ads and embeds, and avoiding late-loading UI that shifts layout. Opportunities in the report help prioritize the highest-impact changes.

Cool Web Tool

$USD

Cool Web Tool

$USD

Performance & CWV

Measure What Slows Your Site and Fix It

Name: Cool Web Tool
Availability: InStock
Author: Cool Web Tool

Track LCP, INP, and CLS with PageSpeed lab insights, opportunities, and mobile or desktop strategy. See honest performance data, not placeholder scores.

Check Web Vitals

See pricing

LCP, INP & CLS

See, Compare, Fix

One visibility loop across technical SEO, competitors, and AI answers.

See

Run a site audit to find what blocks crawlability, content quality, and readiness.

Open site audit

Compare

Benchmark competitors on keywords, gaps, and visibility moves that matter.

Open competitor analysis

Appear in AI

Track how ChatGPT, Claude, Grok, Gemini, and Perplexity mention your brand.

Open AI visibility

How Core Web Vitals checks work

From a URL to prioritized performance fixes without spreadsheet chaos.

Point at a URL

Run performance analysis for your project domain or a page you care about.

Measure lab metrics

Pull PageSpeed lab data for LCP, INP, CLS, and supporting speed signals.

Triage opportunities

Review opportunities and diagnostics so the next fix is clear for SEO and engineering.

Re-check after shipping

Refresh after releases and watch freshness so you are not optimizing on stale scores.

Performance lab report with category scores, metrics, and opportunities

Lab insights built for shipping fixes

Stop guessing which metric is broken. See Core Web Vitals, supporting speed signals, and the opportunities that move the needle.

LCP, INP, and CLS as Google Core Web Vitals, with supporting lab metrics when available
PageSpeed opportunities and diagnostics so engineering knows what to fix next
Mobile and desktop strategy plus freshness so you know when data is stale

Performance monitoring built for SEO work

Focused on Core Web Vitals and PageSpeed lab insights, with a clear handoff into full site audits.

LCP monitoring

See largest contentful paint so you know whether hero content and critical resources are slowing first paint.

INP monitoring

Track interaction to next paint, the responsiveness metric that replaced FID in Core Web Vitals.

CLS tracking

Detect layout shifts that frustrate users and hurt ranking signals for visual stability.

PageSpeed lab metrics

Use Lighthouse lab scores and supporting metrics like TTFB and FCP alongside CWVs.

Opportunities & diagnostics

Surface top PageSpeed opportunities so fixes leave the dashboard and get done.

Mobile & desktop strategy

Compare mobile and desktop lab views so device-specific regressions are not hidden.

Measurement freshness

See when metrics were measured and get stale warnings so decisions stay honest.

Bridge to site audits

Use CWV insights alongside technical site audits when performance issues connect to crawl and content work.

Built for teams who ship speed fixes

One clear job per audience: measure honestly, prioritize, and re-check after shipping.

In-house SEO

Track CWVs that affect rankings, brief engineering with opportunities, and re-check after launches.

Agencies

Standardize performance reviews across clients with strategy, freshness, and clear next steps.

Founders & marketers

Get a clear speed picture without living in Lighthouse exports, then know what to fix first.

Core Web Vitals FAQ

Ready to check what slows your site?

Start a free Core Web Vitals check, review opportunities, and connect speed fixes to your broader SEO workflow.

Check Web Vitals See pricing