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Simple Port Scanner is a free and open-source command-line utility that can quickly search for open TCP ports and display them in a list. It comes in handy for network administrators looking for open ports to establish various connections to their computers in the local network.

The program's not wrapped in an installation kit. Instead, you can save the downloaded items in a custom directory on the disk or copy the items to a removable storage unit, in order to directly run Simple Port Scanner on any PC by just calling its process from a Command Prompt window.

Just keep in mind that Java Runtime must be installed on the target machine, since it was developed win this programming language. The source code is also available in the downloaded package and can be examined by programmers or those interested in coding.

Once the app's name is called from a console window, it automatically starts scanning for open TCP ports and displays all results in a list, including the port number and status of each entry.

Unfortunately, it doesn't implement options for printing or dumping this information to file. On the other hand, you can use the built-in Command Prompt features to select all text and copy it to the Clipboard by hitting the Enter key, in order to paste it in a text editor and inspect the open ports closer.

It didn't put a strain on the machine's performance in our tests, thanks to the fact that it needed a low amount of CPU and RAM to function normally. It carried out port scans rapidly and remained stable throughout its runtime, without triggering the operating system to hang, crash or prompt error messages.

Although Simple Port Scanner doesn't come packer with richer options, it offers a simple and straightforward solution for discovering open TCP ports, and it can be easily used by those accustomed to console programs.