Debugging web applications efficiently requires a combination of browser developer tools, debugging utilities, and performance monitoring services. Here are the top tools for debugging web apps in 2025:

🖥️ Browser Developer Tools

1️⃣ Chrome DevTools (Built into Chrome)

• Inspect HTML, CSS, JavaScript in real-time.
• Network tab to analyze API requests and performance bottlenecks.
• Lighthouse for performance audits.

2️⃣ Firefox Developer Tools

• Excellent CSS Grid & Flexbox debugging tools.
• JavaScript Debugger for step-by-step code execution.
• Better network inspection for WebSockets & API calls.

3️⃣ Safari Web Inspector (For macOS/iOS debugging)

• Best for debugging iPhone & iPad web issues.
• Integrated JavaScript console & performance profiling.

🐞 JavaScript Debugging Tools

4️⃣ Visual Studio Code Debugger

• Breakpoints, step-through execution, and variable tracking.
• Integrates with Node.js, Chrome, Edge, and WebAssembly debugging.
• Extensions for React, Vue, Angular debugging.

5️⃣ Redux DevTools (For React & Redux Apps)

• Time-travel debugging for Redux state changes.
• See exactly how state updates on every action.
• Works with React, Vue, Angular, and plain JavaScript.

6️⃣ React Developer Tools (React-specific)

• Inspect React component trees.
• View props, hooks, and state changes in real-time.
• Performance profiling for re-renders & bottlenecks.

7️⃣ Vue.js DevTools (Vue-specific)

• Debug Vue components, state, and events.
• Track Vuex store updates.
• Performance insights for Vue-based apps.

8️⃣ Postman (API debugging)

• Test REST, GraphQL, and WebSockets APIs.
• Automate API testing & mock responses.
• Debug server responses & authentication flows.

🕵️ Performance Monitoring & Error Tracking

9️⃣ Sentry (Real-time error tracking)

• Tracks JavaScript, Node.js, and frontend errors.
• Captures stack traces, user sessions, and performance issues.
• Works with React, Vue, Angular, and Express.js.

🔟 LogRocket (Frontend session replay & analytics)

• Replays user interactions to see what went wrong.
• Tracks JavaScript errors, console logs, and API failures.
• Heatmaps for UX analysis.

1️⃣1️⃣ New Relic (Full-stack monitoring)

• Monitors backend & frontend performance in real-time.
• Detects slow API calls, database queries, and server issues.
• Works with Node.js, Python, PHP, and cloud services.

1️⃣2️⃣ Lighthouse (Google Performance Tool)

• Detects slow-loading pages & SEO issues.
• Helps improve Core Web Vitals (LCP, FID, CLS).
• Generates detailed audits for mobile & desktop.

🔍 Network & Security Debugging

1️⃣3️⃣ Wireshark (Network traffic analysis)

• Debugs HTTP, WebSocket, and TCP/IP requests.
• Helps diagnose slow loading times and server issues.

1️⃣4️⃣ Burp Suite (Security & vulnerability testing)

• Penetration testing for XSS, SQL Injection, and API security.
• Great for testing authentication & authorization issues.

1️⃣5️⃣ Charles Proxy (HTTP Proxy Debugging)

• Intercepts API requests/responses for debugging.
• Useful for mobile and web apps testing.