PERFORMANCE TOOLS

PERFORMANCE
CHECKER

Measure Core Web Vitals, page speed, and every performance signal that affects your Google rankings and user experience. Free first scan.

CHECK PERFORMANCE →
WHAT WE MEASURE
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Largest Contentful Paint (LCP)
Measures how long it takes for the largest visible element to load. Google target: under 2.5 seconds.
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Cumulative Layout Shift (CLS)
Tracks unexpected layout movements that frustrate users. Target: under 0.1. Anything higher hurts UX and rankings.
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Total Blocking Time (TBT)
Measures time the main thread was blocked and unresponsive to user input. FID proxy. Target: under 200ms.
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Page Weight
Total transfer size of all resources. Bloated pages kill mobile performance. Target: under 1MB uncompressed.
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Time to First Byte (TTFB)
Server response time. Slow TTFB points to hosting, caching, or backend issues. Target: under 600ms.
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Render-Blocking Resources
CSS and JS files that block the page from rendering. Each one adds latency before users see anything.
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Image Optimization
Checks for uncompressed images, missing WebP/AVIF formats, and oversized images serving desktop assets to mobile.
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Compression (Gzip/Brotli)
Verifies text assets are compressed. Uncompressed HTML, CSS, JS can be 3-10x larger than necessary.
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Browser Caching
Checks cache-control headers on static assets. Properly cached assets load instantly on repeat visits.

Performance is revenue

Google has been direct about this: Core Web Vitals are a ranking signal. A slow site ranks lower. Period. But the revenue impact goes beyond rankings — slow sites convert worse too. Amazon measured a 1% revenue drop for every 100ms of latency. That's not a typo.

The three Core Web Vitals — LCP, CLS, and FID (measured here as TBT) — are Google's way of quantifying user experience. LCP measures how fast your page feels. CLS measures how stable it is. TBT measures how responsive it is to interaction. All three are in Google Search Console's Core Web Vitals report.

Most performance issues are fixable without a full rebuild. Uncompressed images, render-blocking scripts, missing cache headers, and unoptimized fonts account for 80%+ of performance debt on the average site. Our checker identifies exactly which issues are costing you the most — ranked by performance impact.

Run a free performance scan, get a ranked hit list of issues with exact fix instructions, and push the fixes live. Most teams see significant LCP improvements within a week of implementing our recommendations.

How fast is your site, really?

RUN FREE SCAN →