EasyNetworkScanner

Easy Network Scanner is a free Windows 11 application that checks what devices are connected to your local network and how well your internet connection is performing. The README is written in German, so the following explanation is based on a translation of its contents.

The tool runs without installation. You copy the folder to your computer or a USB stick, double-click the executable, and it starts immediately. All log files and reports it generates are stored in a folder next to the program itself, so nothing is scattered across your system.

On the network scanning side it can find all active devices on your local network, look up their hostnames and hardware addresses, make a guess at what operating system each device is running, and check which common ports are open. It also includes a more detailed port scanner if you need to check a specific range of ports and export the results as a CSV file. For WiFi networks it pulls an overview from Windows, shows a history of signal quality, and displays which channels nearby networks are using.

For performance testing it measures your internet download and upload speeds and can also measure how fast data transfers between your computer and a network folder on your local network. Additional diagnostic tools include traceroute (which shows the path your internet traffic takes to reach a destination), DNS cache inspection, routing table display, and firewall profile information.

Results can be saved as HTML reports or archived as ZIP files. Running the program with administrator rights gives more complete results, since some network operations on Windows require elevated permissions. The project is released under the GPL-3.0 open-source license.