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Compare Website Performance Side by Side
Run Google PageSpeed Insights on two URLs and get a full Lighthouse comparison report — mobile, desktop, and every audit in one place.
Rich Performance Insights
Sample comparison — shopfast.io vs megastore.com (demo data)
A
shopfast.io
Mobile · Demo
B
megastore.com
Mobile · Demo
Performance Score
shopfast.io
94
Performance
megastore.com
71
Performance
Site A wins by +23 points
All Categories
shopfast.iomegastore.com
Performance94 · 71
Accessibility89 · 92
Best Practices96 · 83
SEO98 · 88
Core Web Vitals — Side by Side
| Metric | shopfast.io | megastore.com | Winner |
|---|---|---|---|
| LCP | 1.8s | 3.4s | A |
| INP | 120ms | 280ms | A |
| CLS | 0.04 | 0.18 | A |
| FCP | 1.2s | 2.1s | A |
| TBT | 90ms | 340ms | A |
Everything You Need
Side-by-Side Compare
Analyze two URLs in aligned columns with synchronized report sections.
Mobile & Desktop
Full Lighthouse runs for both strategies with all four categories.
Complete Reports
CrUX field data, every audit, stack packs, entities, and raw JSON.
Dark Mode & PDF
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