Web Performance
Toolkit
Free tools to measure, analyze, and monitor web performance — from real-user Chrome data to Lighthouse audits and bundle analysis.
Pick a tool
View all 15 toolsREAL USER DATA
3/3Chrome UX Report
Analyze historical performance data based on real users across the globe. Essential for understanding SEO and search rankings.
Compare URLs
Benchmark up to 5 URLs side-by-side to track regressions or validate performance fixes.
Page vs Origin
See how a specific page performs against its site-wide origin data from real Chrome users.
LAB ANALYSIS
2/4Automated Lighthouse Audits
Full Lighthouse audit with performance, accessibility, best practices, and SEO scores.
React Profiler Analyzer
Upload a React DevTools profiler export and get actionable insights — re-render detection, cascade analysis, and evidence-based findings.
Execution Profiler
Deep-dive into main thread activity. Diagnose long tasks, JavaScript execution times, and layout shifts.
Stack Inspection
Identify underlying technologies, frameworks, and CMS platforms to understand their impact on total page weight.
SERVER ANALYSIS
0/5Page Weight Analyzer
Measure the resource weight of any page — JS, CSS, images, and fonts with per-file breakdown.
HTTP Header Audit
Analyze caching, compression, CDN, and security headers for performance issues.
Redirect Profiler
Trace the full redirect chain with per-hop timing and protocol analysis.
Image Analyzer
Detect oversized, unoptimized, and improperly loaded images with fix suggestions.
Third-Party Impact
Classify and measure the performance cost of every third-party script.
MONITORING
0/3Performance Budgets
Set metric thresholds and track field data against your budgets over time.
Regression Detector
Automatically detect statistically significant regressions in CrUX trends.
Scheduled Audits
Run recurring analysis on your URLs with historical tracking and alerts.