PerfKit
React Profiler
Analyzer
Upload a React DevTools profiler export and get actionable insights about what's causing performance issues.
Drop your profiler export here
JSON file from React DevTools Profiler → Export
Client-side parsing
AI-powered analysis
React DevTools compatible
Your profile is parsed locally. Only aggregated metrics (no source code or component trees) are sent for AI analysis.
Re-render Detection
Find components that re-render frequently due to parent cascades, prop changes, or hook updates.
Cascade Analysis
Identify components whose renders trigger expensive subtree re-renders.
Evidence-Based Findings
Every recommendation includes data — commit counts, timing evidence, and confidence levels.