NetSniffer

NetSniffer is a powerful network traffic analyzer for developers, QA engineers, and security professionals. Inspired by Wireshark, it provides deep visibility into HTTP/HTTPS traffic directly in your browser. KEY FEATURES Network Capture - Real-time packet capture using Chrome DevTools Protocol - Support for XHR, Fetch, WebSocket, and all resource types - Per-tab isolation - each tab has its own capture session - Ring buffer prevents memory bloat (configurable limit) Packet Inspection - View request and response headers - Inspect request/response bodies with syntax highlighting - JSON viewer with collapsible tree structure - Smart decode for encoded payloads (Base64, URL encoding, JWT, etc.) - Timing breakdown (DNS, Connect, SSL, TTFB, Download) - Security analysis for requests Filtering & Search - Advanced filter syntax (status:200, method:POST, domain:api.example.com) - Regex support for complex patterns - Quick filters for common scenarios - Search across all captured packets Developer Tools - Request replay - resend captured requests - Modify and replay - edit requests before resending - API Client - build and send custom requests - Mock responses - intercept and mock API responses - Export to cURL, fetch, axios code snippets - HAR export for compatibility with other tools Quality of Life - Bookmarks with color coding - Annotations for collaborative debugging - Session comparison - Keyboard shortcuts - Auto-pause on error detection - Performance indicators (HTTP/2, HTTP/3, cache hits) PRIVACY FOCUSED - All data stays on your device - No analytics or tracking - No external data transmission - Full control over your captured data PERFECT FOR - Frontend developers debugging API calls - Backend developers testing endpoints - QA engineers validating network behavior - Security professionals analyzing traffic - Anyone who needs visibility into browser network activity NetSniffer brings professional-grade network analysis to your browser with a sleek, cyberpunk-inspired interface.