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PageSpeed Catalyst

Core Web Vitals Code Optimizer

Transform Lighthouse Audits into Optimized Code

Upload Lighthouse JSON or HAR files to automatically diagnose LCP, INP, and CLS bottlenecks, then generate copy-paste ready HTML/CSS/JS fixes.

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1. Upload Audit Report

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Drag & drop Lighthouse JSON or HAR file
or click to browse from disk
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Core Web Vitals Metrics

4.2s
LCP (Hero Image)
280ms
INP (Main Thread)
0.24
CLS (Unsized Img)
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2. Generate Optimized Fixes

// Select an optimization target and click generate...
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Unlock Unlimited Optimizations

You have used your 3 free code optimization generations. Unlock lifetime unlimited audits and code packages.

$1.99 / lifetime access