NectoProxyHTTP/HTTPS Debugging Proxy

A powerful, open-source alternative to Charles Proxy and Fiddler. Intercept, inspect, modify, and replay traffic with a modern Web UI.

🔍

Traffic Inspection

Real-time HTTP/HTTPS interception with auto-generated SSL certificates, syntax-highlighted body viewer, and WebSocket frame capture.

🛠️

8 powerful rule actions — Mock, Block, Modify Request/Response, Map Local/Remote, Delay, and Throttle — with flexible URL pattern matching.

⏸️

Pause requests and responses mid-flight. Inspect, modify headers and body, then resume or drop — like a debugger for HTTP traffic.

📶

Simulate real-world network conditions with 11 built-in profiles (2G, 3G, 4G, WiFi, Offline) or create custom throttling rules.

📋

Generate equivalent code in 8 languages — cURL, Python, Node.js, Go, PHP, Rust, HTTPie, and PowerShell — from any captured request.

🛡️

Automatically detect missing security headers, insecure cookies, CORS misconfigurations, and information disclosure issues.

bash

npm install -g nectoproxy
nectoproxy start

The proxy starts on port 8888, and the Web UI opens automatically at http://localhost:8889.

Feature	NectoProxy	Charles Proxy	Fiddler	mitmproxy
Price	Free	$50	Free*	Free
Web UI	Yes	No	No	Partial
Rules Engine	8 actions	Yes	Yes	Scripts
Breakpoints	Yes	Yes	Yes	Yes
Code Generation	8 languages	No	No	No
Request Comparison	Yes	No	No	No
Network Throttling	Yes	Yes	Yes	No
HAR Export	Yes	Yes	Yes	Yes
Open Source	Yes	No	No	Yes

*Fiddler Classic is Windows-only; Fiddler Everywhere is cross-platform but paid.

If you find NectoProxy useful, consider buying me a coffee.

Built with care by Sitharaj Seenivasan.