FREE Serial Port Monitor
Record COM port activity into a text file

FREE Serial Port Monitor is a COM port software to record all serial communication data into a text file. It easily collects data from a serial port device and saves this precious information into a new text file or continues from previous session.

FREE COM Port Monitor can log up to 256 serial ports at the same time. Serial Port Monitor is an absolutely FREE, open source application, which means you can freely use it, study, change and improve

Advanced Serial Port Monitor

Serial Port Monitor is a highly-functional and friendly utility that works with RS232/RS422/RS485 ports and allows you to save a lot of your time while developing and testing serial applications and hardware. It offers the full set of advanced port monitoring features, including a built-in terminal, unique data filtering options, convenient data viewing modes, session playback capability, and more.

Free Serial Port Monitor overview

The software is designed to assist you in analyzing communications established between a computer and connected serial equipment.

  • COM port data logging

    COM port data logging

    FREE Serial Port Monitor has a simple interface, so to begin serial logging, you just need to select a serial port, choose where to file serial communication data, define RS232 port's parameters and click "Start".
  • Working in a virtual environment

    Working in a virtual environment

    FREE Serial Port Monitor can be installed and used under virtual machines, like VMware or Hyper-V. Such functionality can be successfully used for testing. Our serial port logger is great for learning purposes, too.
  • Collecting serial data in real time

    Collecting serial data in real time

    When you attach COM-based devices, like scales, meters, barcode scanners, etc. to an RS232 port of your computer, FREE Serial Port Monitor lets you connect to this port and collect data it receives from the serial equipment. With FREE Serial Port Monitor, it's simple to see and learn how serial ports work!

Feature list comparison

Check out the main differences in feature packs of free open source and advanced versions

# Options Free Advanced
1 Support for RS232 ports
2 Compatibility with RS422, RS485 ports
3 Reading COM port data and saving it to a file
4 Logging data from any number of serial ports at a time
5 Capturing all data received by a COM port
6 The possibility to add several ports for monitoring in one session
7 Support for all baud rates
8 Search options
9 Filtering of recorded IPRs
10 Availability of several data viewing modes

Supported operating systems:

  • 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