performanceAnalyzer

Analyze web performance, SEO, accessibility (WCAG), security, React diagnostics, network activity, and CPU/memory usage in real-time

PERFORMANCE ANALYZER: Your Complete Web Auditing Companion Transform your web development workflow with Performance Analyzer—a powerful Chrome extension that brings enterprise-grade auditing capabilities directly to your browser. Analyze any web page across performance, accessibility, SEO, security, React diagnostics, and network monitoring. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ WHAT YOU GET (9 Powerful Modules) ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ⚡ WEB VITALS Measure Core Web Vitals that directly impact user experience and SEO rankings: • FCP (First Contentful Paint) - First pixel renders • LCP (Largest Contentful Paint) - Main content loads • CLS (Cumulative Layout Shift) - Visual stability • INP (Interaction to Next Paint) - Response to user input • TTFB (Time to First Byte) - Server speed Get instant ratings (Good/Needs Work/Poor) for each metric with actionable optimization tips. 🔍 SEO AUDIT (0-100 Score) Evaluate on-page SEO fundamentals that affect search rankings: • Title & meta description analysis • Heading hierarchy validation • Technical SEO (viewport, lang, canonical) • Open Graph & social metadata • Image alt text coverage • Link safety (noopener/noreferrer) • JSON-LD structured data detection Identify critical SEO issues with specific recommendations to improve visibility. ♿ WCAG ACCESSIBILITY (0-100 Score) Ensure WCAG 2.1 compliance across 4 pillars: • Perceivable: Image alt text, iframe titles, link accessibility • Operable: Keyboard navigation, skip links, button names • Understandable: Language tags, form labels, page titles • Robust: Semantic landmarks, heading structure Detector automatically flags accessibility barriers and suggests fixes. 💾 MEMORY PROFILE (React Apps) Deep-dive into React component memory usage: • Component detection via React DevTools hook or DOM fiber references • Memory estimate per component (bytes breakdown) • Hook cell counting (useState, useEffect, etc.) • Leak risk indicator (Stable/Watch/Leak Risk) • Top memory-consuming components ranked Identify memory leaks before they impact production performance. 🌐 NETWORK MONITORING Inspect all HTTP requests in real-time: • Full request/response details (URL, method, status, size, duration) • Rich timing breakdown (DNS, TCP, TLS, wait, response times) • Interactive JSON response viewer with auto-repair • Request type classification (xhr, fetch, img, script, etc.) • Initiator tracking to find request sources Debug API calls and optimize network payloads. ⚛️ RERENDER TRACKING (React Apps) Monitor React component render performance: • Total render count per component • Render reason attribution (mount, state, props, parent) • Identify unnecessary rerenders from prop changes • Spot render loops and cascade effects • React.memo() effectiveness validation Optimize React performance by targeting high-rerender components. 🔗 UNMOUNT LEAKS (React Apps) Detect component lifecycle issues: • Mount/unmount lifecycle tracking • Memory growth during unmount detection • Component instance pile-up warnings • Effect cleanup validation Catch memory leaks caused by missing useEffect cleanup. 📈 CPU & MEMORY USAGE (Real-Time) Monitor system resource consumption while you interact: • Real-time CPU usage gauge with trend • JavaScript heap size tracking • 60-point rolling history chart • Peak, average, and current statistics • Color-coded gauges (Green/Yellow/Red) Spot performance bottlenecks during user interactions. 🔒 CYBER SECURITY Scan for 15+ security vulnerabilities: • HTTPS/mixed content detection • Content Security Policy (CSP) validation • Subresource Integrity (SRI) for CDN resources • Inline event handler detection • Dangerous function usage (eval, document.write) • Iframe sandbox attribute checking • Form submission security • Sensitive data in localStorage/sessionStorage • Open redirect patterns • XSRF token exposure • Referrer policy validation • XFrame-Options compliance Identify security risks before they become breaches. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ HOW TO USE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🎯 THREE WAYS TO ACCESS: 1. POPUP (Quick Snapshot) → Click extension icon while browsing → Get instant Web Vitals, SEO, and WCAG scores → Perfect for quick page checks 2. DEVTOOLS (Full Analysis) → Right-click extension → Inspect → Access all 9 modules with detailed breakdowns → Best for deep auditing and debugging 3. SIDE PANEL (Interactive Testing) → Right-click any page → "Open Side Panel" → Keep analysis visible while interacting with page → Watch metrics update in real-time ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ SCORING SYSTEM ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🟢 GREEN (85-100): Excellent - Minimal issues 🟡 YELLOW (60-84): Needs Work - Room for improvement 🔴 RED (0-59): Poor - Critical issues need addressing All scores use transparent, auditable formulas—no black-box AI. Every point is earned through clear metrics. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ WHO BENEFITS ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 👨‍💻 Front-End Developers Optimize React apps, track performance, catch memory leaks, debug network requests 🎯 SEO Specialists Audit on-page SEO, fix ranking barriers, validate structured data ♿ Accessibility Experts Ensure WCAG compliance, identify barriers, track accessibility improvements 🔐 Security Engineers Scan for vulnerabilities, validate security headers, detect sensitive data exposure 📊 Product Managers Monitor real user experience metrics, track performance trends, prioritize optimizations 🧪 QA Engineers Comprehensive regression testing, security scanning, accessibility validation ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ KEY FEATURES ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✅ Real-Time Analysis - Audits update as page loads and changes ✅ No Data Collection - All analysis runs locally; nothing sent to servers ✅ Zero Performance Impact - Minimal CPU overhead (<1%) ✅ React-Optimized - Special detection for React apps (DevTools hook + DOM fiber fallback) ✅ Keyboard Navigation - Full keyboard support for accessibility compliance ✅ Instant Ratings - Green/Yellow/Red status for every metric ✅ Actionable Insights - Specific recommendations for each issue ✅ Copy-Friendly - Easy export of findings to spreadsheets/reports ✅ Multi-Page Testing - Navigate and audit multiple pages in one session ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ TYPICAL USE CASES ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 📱 New Release Quality Gate Run full audit before publishing to production. Target: All Web Vitals green, SEO/WCAG ≥75, Security issues 0. ⚡ Performance Tuning Use Web Vitals + CPU/Memory modules to identify bottlenecks. Track LCP/CLS/INP improvements. ♿ Accessibility Sprint Batch fix issues found in WCAG module. Move from Red (0-59) → Yellow (60-84) → Green (85+). 🔍 Competitor Analysis Audit competitor sites to benchmark performance, SEO, and accessibility. Identify gaps in your site. 🛡️ Security Audit Scan internal apps for vulnerabilities before penetration testing. Validate CSP/SRI/HTTPS deployment. ⚛️ React App Optimization Use Memory Profile + Rerender Tracking to optimize component performance. Reduce heap growth. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ PERMISSIONS EXPLANATION ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🔗 Host Permissions (http://* , https://*) → Needed to: Run performance audits and security scans on any website 🐛 Debugger Permission → Needed to: Access DevTools API for memory profiling and React diagnostics 📑 Tabs Permission → Needed to: Detect active tab and run audits on current webpage ⚙️ Scripting Permission → Needed to: Execute audit functions within page context (Performance Observer, DOM queries) 🖼️ Side Panel Permission → Needed to: Open extended analysis panel alongside the webpage 💾 Storage Permission → Needed to: Cache audit results and user preferences locally No data is ever sent to external servers. All analysis runs in-browser, respecting your privacy. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ WHAT'S NOT INCLUDED ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ • Lighthouse integration (independent analysis based on open standards) • PWA auditing (not currently implemented) • Lighthouse reports export (planned for future version) • API rate limit monitoring (focus: manual requests only) ═══════════════════════════════════════════════════════════════════════════════ Get started today. Audit your website in seconds. Optimize with confidence. Questions? Check the comprehensive user manual included in the extension.