NinjaTerm is a terminal application aimed at embedded developers who need to view debug data and send commands while developing firmware for devices such as microcontrollers.
It provides installable desktop builds and an older web-based version, with support for serial ports, TCP sockets, Bluetooth LE, and SEGGER RTT connections.
This is free and open source software.
Key Features
- Connects to devices using serial ports, TCP sockets, Bluetooth LE, and SEGGER RTT.
- Displays ANSI CSI colour codes for clearer debug output.
- Graphs extracted data from text-based streams.
- Includes smart scrolling for following recent output while preserving earlier context.
- Shows invisible characters with custom glyphs for ASCII control characters and byte values.
- Logs terminal data to the file system for later analysis.
- Filters received data to focus on relevant messages.
- Parses received data as multiple number types including hex, integers, and float32.
- Supports combined TX/RX and separate terminal views.
- Provides macros for sending repetitive ASCII or HEX data.
Website: github.com/gbmhunter/NinjaTerm
Support:
Developer: Geoffrey Hunter
License: GNU General Public License v3.0

NinjaTerm is written in TypeScript. Learn TypeScript with our recommended free books and free tutorials.
Related Software
| Graphical Serial Terminal Tools | |
|---|---|
| Tabby | Polished tabs host shell and UART workspaces under one roof |
| Electerm | Remote consoles meet transfer tools alongside COM line access |
| GTKTerm | Simple, graphical serial port terminal emulator |
| moserial | Clean, friendly GTK-based serial terminal for the GNOME desktop |
| WhippyTerm | Has a number of unique features such as bookmarks and built in hex dumps |
| PuTTY | SSH and telnet client |
| SerialGUI-Rs | Rusty monitor captures frames, toggles baud, highlights chatter |
| NinjaTerm | Embedded debugging feels swift with macros, hex views, reconnection |
| 8N1Term | Direct 8N1 sessions pair lean controls, cables, prompts, logs |
| Omnicom | Visual port handling suits modems, sensors, test rigs |
| HTerm | Uses wxWidgets, fmt, and spdlog |
| CuteCom | Graphical serial terminal |
Read our verdict in the software roundup.
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