Stop guessing why your network is slow. This cross-platform tool puts ICMP, TCP, UDP, and HTTP diagnostics into one beautiful dashboard — and it's completely free.
We've all been there. The internet starts acting up, and before you know it, you're staring at a black terminal window, typing ping baidu.com, watching milliseconds scroll by, and wondering: Is it my WiFi? The router? The ISP? The server I'm trying to reach?
Then you open another terminal for traceroute, another for nslookup, maybe one more for curl. Five windows later, you're still guessing. Traditional network diagnostics is like trying to map a house by touching one wall at a time in the dark.
NetSonar changes that. It's not "yet another ping tool" — it's essentially a diagnostic operating system for your network, combining multi-protocol testing, real-time visualization, interface management, and device scanning into a single, elegant cross-platform application.
Built by prolific open-source developer Tiago Conceição (sn4k3), NetSonar has quietly amassed over 1,600 GitHub stars and 12 releases since launch. The latest v0.3.1 dropped just two days ago. Here's why developers and sysadmins are paying attention.
Here's the classic trap: you ping a website, get a response, and assume everything is fine. But ICMP only tells you the network layer is alive. The HTTP service could be crashed, the TCP port could be firewalled, and you'd never know.
NetSonar lets you test four protocols simultaneously from one screen:
| Protocol | What It Tells You | Best For |
|---|---|---|
| ICMP | Network-layer reachability | Basic connectivity checks |
| TCP | Service port availability | Web servers, databases, mail servers |
| UDP | Connectionless service health | DNS, DHCP, game servers, streaming |
| HTTP | Application-layer status | REST APIs, web services, health checks |
Configure all four for one host, and you can instantly see: ICMP green, TCP green, HTTP red → the web server process is down, not the network. That's the kind of precision that saves hours of guesswork.
Raw ping numbers are hard to parse. A chart tells the story instantly.
NetSonar uses LiveCharts to plot latency as real-time line graphs with a traffic-light color scheme:
For the nightmare scenario — intermittent lag that strikes every few minutes — text-based tools are nearly useless. In NetSonar, you just watch the chart. A sudden spike tells you exactly when it happened. A sawtooth pattern across multiple hosts points to a shared bottleneck. One glance and you've narrowed the problem from "something's wrong" to "the optical modem drops every 30 minutes."
A real case from the community: a user's home network kept dropping every half hour. After swapping three routers with no improvement, they ran NetSonar simultaneously against the router, optical modem, and a public DNS server. Only the modem's line showed drops at every failure point. Armed with that chart, the ISP technician replaced the modem immediately — problem solved.
Instead of ifconfig, ip addr, or digging through system settings, NetSonar gives you a single dashboard showing every network adapter with live stats: IP addresses, MAC addresses, traffic counters, error counts, and connection speeds. You can enable or disable interfaces with one click — no more typing sudo ifconfig eth0 down.
This bridges the gap between hardware troubleshooting and software diagnostics. Is the WAN port auto-negotiating at 100Mbps instead of 1Gbps? You'll see it immediately.
NetSonar can scan your local subnet to discover all connected devices, their open ports, and running services. Got a dozen devices on your home network and want to know which one is running an unexpected SSH server? One scan and you have the answer. This elevates NetSonar from a point-to-point diagnostic tool to a network map generator.
NetSonar's architecture is refreshingly clean:
PingableServiceThe application compiles to native platform binaries — no web wrapper, no Chromium overhead. It runs on x64 and ARM64 (including Apple Silicon Macs and Raspberry Pi), with a memory footprint that won't embarrass you.
It also ships with a local HTTP API on localhost:5000 and a full CLI mode, so you can script it into CI pipelines or monitoring systems:
# CLI ping
NetSonar ping --host example.com --protocol http --count 5
# Subnet scan
NetSonar scan --range 10.0.0.0/16 --ports 22,80,443
# API call
curl http://localhost:5000/api/ping?host=example.com&protocol=tcp
No dependency hell. No Docker required. No npm install.
Windows:
winget install -e --id PTRTECH.NetSonar
Linux & macOS:
bash -c "$(curl -fsSL https://raw.githubusercontent.com/sn4k3/NetSonar/main/scripts/install-netsonar.sh)"
Need a specific version? Append it:
bash -c "$(curl -fsSL ...)" -- 1.2.3
That's it. The script auto-detects your OS, CPU architecture, and package manager. You're running in seconds.
Network diagnostics shouldn't be a black art. NetSonar takes the fragmented toolkit of ping, traceroute, curl, nslookup, ifconfig, and nmap — and unifies them into a single, visually intuitive experience.
It's open source. It's cross-platform. It installs in one command. And with 1,600+ stars and an active community, it's only getting better.
Next time your network stutters, don't guess. See it.
Links: