Best Serial Terminal macOS App for IoT & Embedded Engineers
Serial Terminal for Mac helps you connect USB-to-Serial/UART devices, monitor TX/RX data reliably, and troubleshoot protocol issues faster.
Everything you need in one Serial Terminal for Mac app for serial port debugging.
Split the live stream into frames, decode named fields, and verify the checksum. Modbus RTU is built in.
Configure port, baud rate, data bits, parity, and stop bits with one click.
Text/HEX dual view with encoding support and line endings (LF/CRLF).
VT100/Xterm terminal emulation with shell access, local echo, and quick command shortcuts.
Timestamps, auto-scroll, search and filter, right-click copy, and a Text View for selecting across lines.
Built-in MCP server with SSE protocol support for AI integration.
Save logs locally, and export filtered protocol frames as CSV or JSON.
Quick send, timed/loop send, and file transfer with progress tracking.
Supports all USB serial ports and RS232/RS485 adapters.
Protocol Inspector · New in 1.4
Protocol Inspector splits the TX/RX stream into frames, names every field, and checks the checksum — while the port stays open.
Slave Address
1
Function
Read Holding Registers
Byte Count
4
Register 0
2563 → 25.63 °C
Register 1
482 → 48.2 %RH
CRC-16/Modbus
Valid
Fixed length, delimiter, header plus fixed length, header plus length field, or idle gap. Pick the one your device speaks.
Integers, floats, text, raw bytes, enums, and bit fields — with byte order, scaling, and units.
Sum, XOR, CRC-8, CRC-16/Modbus, and CRC-32. Bad frames are flagged, never hidden.
Requests, responses, exception codes, and CRC are decoded with no setup at all.
Paste a HEX sample into the template tester and watch the fields resolve. Import and export templates as JSON, then export filtered frames as CSV or JSON.
Preview 100 framed live records for free. One purchase unlocks it permanently, and Restore Purchase is built in. Protocol and serial data never leave your Mac.
Four steps from a cold port to structured data.
Pick the port, set baud rate, data bits, parity, and stop bits, then open it. Several ports can stay open at once.
Read Text and HEX side by side, save commands as templates, or drop into a VT100 shell.
Switch to Protocol, choose a template, and read the fields. Filter by direction, function, or checksum result.
Save filtered frames as CSV or JSON, or let an AI agent read the port through the built-in MCP server.
Watch how Serial Terminal streamlines your debugging workflow.
Clean, intuitive design built for productivity.
Real-time Text/HEX dual view with multi-port simultaneous connections.
Transfer firmware and binary files with real-time progress tracking.
Save frequently used commands as templates with tags for quick access.
Set up automated responses and heartbeat pings for unattended testing.
Run the built-in MCP server for SSE-based AI integrations.
Switch into VT100/Xterm terminal mode for embedded shell sessions with local echo and quick command keys.
Your data stays on your Mac. Always.
Download Serial Terminal for Mac and debug serial devices on macOS faster.
Download on Mac App Store