Browser Performance Profiler

Professional browser-based performance analysis tool that measures Core Web Vitals (LCP, FID, CLS), generates resource waterfalls, tracks memory usage, analyzes JavaScript execution, and provides Lighthouse-style scoring with actionable optimization recommendations. Works entirely in the browser without extensions.

Core Web Vitals Analysis Resource Waterfall Chart Memory Leak Detection JavaScript Profiling Lighthouse-Style Scoring

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Instant results
Privacy-focused
Mobile friendly

Analyze Any Website

Quick test:

Test Configuration

Core Web Vitals

LCP
Largest Contentful Paint
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Waiting...
FID
First Input Delay
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Waiting...
CLS
Cumulative Layout Shift
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Waiting...

Performance Score

0
Performance
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Speed
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Accessibility
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Best Practices
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SEO

Page Information

Title

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Load Time

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Page Size

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Requests

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Resource Breakdown

Optimization Recommendations

Enter a URL and click analyze to get recommendations

Page Screenshot

Screenshot will appear here after analysis

Frequently Asked Questions

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