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Free Virtual Serial Ports

by HHD Software Ltd.

HHD Software Free Virtual Serial Ports is a software package that allows you to create virtual COM ports.

Created virtual COM port may be used in one of the following ways:

  1. Connected to a named pipe.
  2. Connected to another virtual COM port, forming a virtual "bridge" and emulating virtual Null-modem cable.
  3. Connected to two files. When an application opens a virtual COM port and "reads" data from it, data is read from an input file, and when it "writes" data to a serial port, data is written to the output file.

Product Organization

Technically, the product consists of the following components:

Free Virtual Serial Ports Device Driver
This device driver implements the functionality of the virtual serial port device. It operates in user mode space, unlike most other device drivers, making the system more stable and secure.
Free Virtual Com Ports ActiveX Control
Provides rich application programming interface (API) for applications that want to create and manage virtual serial ports.
Free Virtual Com Ports Configuration Utility
An example of ActiveX Control API client, which provides simple user interface for creation and management of virtual serial devices.

Supported Environments

Free Virtual Com Ports currently supports the following operating systems:

  • Windows Vista (32 and 64 bit)
  • Windows 7 (32 and 64 bit)
  • Windows Server 2008 (32 and 64 bit)
  • Windows Server 2008 R2 (64 bit)

On 64-bit operating systems, both 64-bit and 32-bit ActiveX control libraries are installed and registered, allowing both 64-bit and 32-bit client code to create and manage virtual COM ports.

Screenshot Usage Areas Request Feature

Free Virtual COM Ports can be successfully used to:

  • create any number of virtual COM port pairs connected via a virtual null-modem cable
  • share virtual COM ports data with files and named pipes
  • add unlimited number of COM ports to your Windows operating system
  • record COM port application data transfer to a file
  • emulate rs232 null modem cable
  • develop rs232 peripheral hardware
  • research the functionality of third-party software and hardware
  • implement, debug and test serial protocol between device and device driver
  • analyze and reverse-engineer serial protocols

Free Virtual COM Ports can be successfully used by:

  • software developers
  • hardware engineers
  • IT support specialists
  • programmers
  • beta-testers
  • industrial control personnel
  • SCADA software engineers
  • science technicians
  • systems integrators, consultants
  • lab experts
  • University students

Request Feature

Please use the form below to request a functionality to be included into the product.

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Release Details
Release Date:
Platforms: »
· Windows Vista
· Windows 7
· Windows 8
· Windows 8.1
· Windows Server 2008
· Windows Server 2008 R2
· Windows Server 2012
· Windows Server 2012 R2
Interface: »
· English
License Type:
· Freeware
File Size:
6.76 MB
PAD File:
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