Comm Echo: Serial Port & TCP/IP Debugger

Key Features

• Comm Echo is a free debug tool for serial port (RS232), TCP/IP and UDP port communication.
• It works like an echo wall for serial port, TCP/IP sever, TCP/IP client and UDP.
• It displays all received data in Text, Hex or Decimal format.
• It lists all available serial port on computer automatically.

Technical Specifications

• **Publisher:** https://www.serialporttool.com/CommEcho.htm
• **License:** Freeware
• **Operating System:** Windows 7, Windows 8, Windows 10, Windows 11
• **Last Updated:** October 15, 2025
• **Category:** Programming / Debugging Tools