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NetMon

A lightweight network bandwidth monitor that lives in the corner of your screen — DU Meter style, but free, modern, and built for Windows 11.

⬇ Download v1.9.2 View source

C# / WinForms · .NET 10 · 13 ★ on GitHub · MIT licensed

Why NetMon

🪶 Tiny footprint

Single-window widget, draggable, always-on-top optional. Sub-megabyte RAM, near-zero CPU.

📊 DU-Meter style graph

Vertical bar spikes — green for download, red for upload. The classic DU Meter look, rewritten in v1.6 for cleaner reading.

🔌 VPN-aware

Counts the actual interface, not the underlying NIC — so the numbers stay honest under any VPN tunnel.

🪟 Fluent polish

12 px Win11-style rounded corners, vertical gradient background, smooth jitter-free resize, and a Segoe UI Semibold speed readout.

🔔 Auto-update check

v1.7 checks GitHub for new releases on startup (throttled to once every 6 h). A quiet tray toast notifies you — click to open the release page. Manual check + toggle in the tray menu.

⚙️ No bloat

No telemetry, no ads, no "pro" tier. Just a number and a graph.

Getting started

Run it — no installer. Download the latest release and launch it; the widget appears as a small floating window. It's self-contained and portable, so it runs from any folder.
Put it where you like. Drag the widget into a corner of your screen, and turn on always-on-top if you want it to stay visible over other windows.
Right-click for options. The tray menu lets you check for updates (or toggle the automatic check) and quit.
It just counts correctly. NetMon measures the active network interface, so the numbers stay honest under any VPN tunnel — nothing to configure.

Good to know

📥 Portable, no install

A single self-contained app — run it from any folder or a USB stick. It isn't code-signed, so if SmartScreen warns you, click More info, then Run anyway.

🔒 Private by default

No telemetry, no ads, no "pro" tier. NetMon only reads your own network counters, on your machine.

🪟 Windows 10 & 11

Runs on 64-bit Windows 10 and 11. Built with C# / WinForms on .NET.