Free Serial Port Monitor
Monitor and log all serial data transmission


Free COM Port Monitor enables the redirection of data transmitted through serial ports by devices and applications using the RS232 protocol. The data can be saved to a file for analysis at a later time.


Free Serial Port Monitor can access data from any available real or virtual serial interface and can be used on virtual machines. Collect data from multiple COM ports at the same time. It is a FREE Open Source application which means you can analyze and modify the source code to suit your specific needs.


Solutions to Common Usage Scenarios


Monitor serial data transmission


The user-friendly interface of free Serial Port Monitor makes it easy to monitor and log your serial data traffic. It’s simply a matter of choosing the serial port to be monitored, selecting a location where the log file will be stored, configure parameters of the serial interface, and click “Start”. All information pertinent to the RS232 data transmission and your COM port communication is captured by this free Serial Port Sniffer.

An example of this Windows serial port monitoring tool in action is using it to track your movements by exchanging data between a GPS device and your laptop.


Increase your knowledge concerning serial communication


Free Serial Logger supports many virtual environments such as Microsoft Hyper-V, VMware, Citrix XenDesktop, ESX, and others. Employing virtual machines for testing purposes saves physical resources and allows multiple configurations to be observed simultaneously.

This serial port communication software is an excellent tool for learning about serial interfaces, applications, and devices. It also can serve as an indispensable aid in efforts to test and debug serial apps and devices. All of the details of the serial communication in your system can be monitored and logged for future study and analysis.

Free Serial Port Monitor for Windows 10/7 allows you to easily learn the ins and outs of serial interfaces and communication.


View serial port data transmission statistics


Free Serial Port Monitor allows the selection of parameters to conform to the COM interfaces that you will be logging. You can manage the parameters for stop bits, parity checks, flow control, baud-rate, and the number of transmitted bits. Verification of successful logging is performed through the display of real-time statistics regarding total bytes received from the monitored port and the total bytes sent to the logging file.


Free Serial Port Monitor supported:


  • Windows 10 (32-bit and 64-bit)
  • Windows Server 2012
  • Windows 8 (32-bit and 64-bit)
  • Windows 7 (32-bit and 64-bit)
  • Windows 2008 (32-bit and 64-bit)
  • Windows 2003 (32-bit and 64-bit)
  • Windows Vista (32-bit and 64-bit)
  • Windows XP (32-bit and 64-bit)
  • Windows 2000
  • Windows NT 4.x
  • Windows Me
  • Windows 98