Port Listener v1.03

Use Port Listener as a free lightweight utility to listen on the specified tcp or udp port. Great for testing "port in use" issues or port testing. This simple utility runs in your system tray and can listen on the port you specify. You can run multiple instances of the application so that you can test multiple ports in use at the same time. The port data view allows you to see what data is being sent to the port. This allows you to analyze the data and see if the transfer is correct.

We use this utlity for testing error conditions from our other software, we figured you might find it useful too. Click here to download Port Listener v1.03 .

Command line options for Port Listener:

Port number is supported to be passed along the command line.

listener.exe [port number]

If its a valid port number, the program will start listening immediately on that port number.

Not sure what a command line is or how to use it? See our Support FAQ

How to close Port Listener:

Click the Exit button

Port Listener will only work successfully on these specific Windows operating systems: