9 Best Free and Open Source Serial Port and Telemetry Visualization Tools

A serial terminal is software that allows communication with devices through a serial port, often used for debugging embedded systems and interacting with hardware like microcontrollers. It essentially acts as a bridge, displaying data sent to and received from the connected device and enabling users to send commands or data to the device.

This roundup looks at software designed for working with serial data, telemetry streams, and time series information.

These tools help users monitor, test, debug, plot, and analyze data received from serial ports, Bluetooth connections, TCP/UDP sockets, embedded devices, sensors, microcontrollers, and other connected hardware.

They range from straightforward serial monitors and port-testing utilities to more advanced dashboards capable of real-time visualization, graphing, packet inspection, and data playback. Some focus on developers needing reliable communication diagnostics, while others are aimed at engineers, makers, researchers, and hobbyists who need to turn raw incoming data into clear, readable charts. Features commonly include cross-platform support, configurable connection settings, live plotting, logging, filtering, protocol debugging, and visual analysis of telemetry or time series data. Together, they provide useful options for anyone building, testing, troubleshooting, or analyzing systems that communicate over serial or network-based data channels.

Our findings are captured in the ratings chart below in the classic LinuxLinks-style. Only free and open source software is eligible for inclusion.

Ratings chart

Serial Port and Telemetry Visualization Tools
Serial StudioTelemetry dashboard and real-time data visualization tool
SerialTestTest tool for serial port, Bluetooth, TCP and UDP
PlotJugglerVisualizing and analyzing time series data
COMToolCross platform serial debug tool
Telemetry ViewerData visualization tool
Tauno Serial PlotterGraphical serial data plotting tool
seriotSerial monitor and serial plotter
QSerialCross-platform serial port utility
SerialToolSerial-Port/TCP/UDP debugging tool
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