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Serial Port Monitor
COM port monitoring software

Serial Port Monitor is a professional and powerful system utility for RS232/422/485 ports monitoring. COM monitor displays, logs and analyzes all serial port activity in a system. This is an ideal way to track down problems that may occur during application or driver development, testing and optimization of serial devices, etc.

Serial Monitor also offers advanced filtering and search, professional built-in terminal and data exporting options, user-friendly and flexible interface among its key advantages. It is a completely software solution, you don't need any additional hardware to use it.

Serial Port Monitor can be purchased as a Standard or Professional Edition.

With Serial Port Monitor you can

  • Analyze serial port activity

    Serial Port Monitor can connect to a COM port, which is even already opened by any application, and can start monitoring it right away. All the data that goes through the monitored COM port will show up in our monitoring tool. Everything is captured in real-time, so you can track down problems immediately.

    Moreover, you can redirect all the monitoring data to the specified file or you can copy all recorded data to clipboard. Serial Port Monitor gives you the ability to intercept and record all serial input/output control codes (IOCTLs), tracking their full details and parameters. You can save any monitoring session and load it next time whenever you need it.
  • Monitor several ports within one session

    Serial Port Monitor has a unique functionality of monitoring several COM-ports simultaneously. Now you can collect data on how apps interact with two or more ports and a few devices concurrently within one session. Data received and sent during monitoring will be presented (recorded) in a single log on a first-in first-out basis; this makes it more convenient for analysis.
  • Read captured data in different ways

    You can view data in all 4 monitoring views at the same time: table, line, dump or terminal mode, each providing a different way to represent recorded serial data. COM Monitor lets you choose monitoring filters, thus saving your time and letting you track down only those events you are interested in.
  • Emulate data sending to serial device

    You can send data in various formats (string, binary, octal, decimal, hexadecimal, mixed) to monitored serial port as if it was sent on behalf of monitored application using terminal mode feature of Serial Monitor. Thus you can follow the reaction of the monitored serial device to some special commands and data.

Serial Port Monitor full features list

Start/stop monitoring the serial port that is already opened by another application (available in Professional Edition only)
Serial Port Monitor is completely compatible with Windows 10 (both x32 and x 64)
Serial Port Monitor and all of its internal drivers are digitally signed
Any number of serial ports can be monitored simultaneously
Possibility to add several ports for monitoring in one session
Supports all COM-port types: standard on-board ports, extension board ports, software-based virtual COM ports, bluetooth serial ports, USB to SERIAL cradles, etc
Data transmission monitoring and logging
Advanced send dialog: easily send various types of data, apply aliases for faster typing and automation, send files and loop functions and commands, change serial port parameters on-the-fly (available in Professional Edition only)
Real-time data capturing
Various monitoring visualizers: table view, line view, dump view, terminal view

Corporate, OEM & Source code

Whether you're looking at redistributing our Serial Port Monitor technology as a part of your product or considering Serial Port Monitor software for an enterprise-wide deployment, we offer flexible and affordable corporate solutions designed to meet your needs.

Source Code License

Ordering Source Code license for Serial Port Monitor you receive all extensively commented programming source code (GUI sources are not included). Our leading developers will help you implement Source codes and understand the advanced part of the product.

Read our Source Code license terms and conditions

Site Licensing

Unlimited Site License grants you the right to install and utilize Serial Port Monitor application with GUI on unlimited number of computers by all workers of your company worldwide. It is the ideal solution if your company has representation offices in the different parts of the world.

If you know the certain number of computers to be equipped with Serial Port Monitor you may consider obtaining Limited Site License. The advantage of Site Licensing comparing to multiple Single licenses is one license key for all company computers.

Compare STANDARD and PRO versions

# Feature Standard Pro
1 Monitoring serial ports which are already in use
2 Sending/receiving data to/from any COM port (Advanced Send Dialog)
3 The possibility to change COM port parameters from Advanced Send Dialog
4 Any serial port software/hardware can be analyzed
5 Monitor any number of serial ports at once
6 Supports all COM-port types
7 Intercepts all data read from/written to COM port
8 Built-in search
9 4 types of customizable monitoring visualizers for viewing and logging data
10 Incoming and outgoing data streams logging

What customers say

  • Without the Serial Port Monitor from Eltima, I would not have been able to easily and quickly see the operation of the several serial ports carrying data to the navigation program...
    Jon Kinne

Let's get started

Serial Port Monitor for Windows
Demo version limitations
• fully functional 14-day trial
System Requirements
Windows 2000, Windows (32-bit and 64-bit): XP/2003/2008/ Vista/7/8/10, Windows Server 2012
Latest Update
Version 6.0.235 (17th Jul, 2015) Release notes