Serial Communication Tool - Web Serial

Tracking since Apr 4, 2026.

Changelog

• May 5, 2026
  description

  [v1.4.0 NEW] Send history (↑↓ keys), Macro scripting (SEND/WAIT/RETRY), Regex alerts, RX/TX rate display, Drag & drop reorder, Auto-save on disconnect, Response time monitor, Per-command timeout, Auto-scroll pause
  
  Serial Communication Tool is a browser extension for communicating with PC COM ports (serial devices) using the Web Serial API. No dedicated software installation required — send, receive, and log serial data directly in Chrome.
  
  • Serial Communication — Configure baud rate, data bits, parity, stop bits, flow control, RTS/DTR signals
  • Send/Receive Log — Timestamped logs with export (TXT/JSON/CSV), filtering, and auto-save on disconnect
  • Send History [NEW] — Press ↑/↓ to recall past commands (up to 50)
  • Quick Commands — Register frequently used commands for one-click sending with drag & drop reordering
  • Macro Automation [NEW] — SEND/WAIT/RETRY syntax for automated sequences with response waiting and retries
  • Alert Monitoring — Keyword alerts with beep and highlight, regex pattern support
  • RX/TX Rate Display [NEW] — Real-time communication speed (bytes/sec) on the monitor strip
  • Response Time Measurement — Measures time from send to device response
  • HEX Binary Send — Send binary data in hexadecimal format
  • Profile Sharing — Import/export connection settings for team sharing
  • Auto-Connect — Automatic reconnection to previously used devices
  • Keyboard Shortcuts — Ctrl+D, Ctrl+L, Ctrl+Shift+S, /, ↑↓, Escape
  • Multi-language — 8 languages: Japanese, English, Chinese, German, French, Portuguese (Brazil), Spanish (Latin America), Korean

  A modern, browser-based alternative to Tera Term and PuTTY. Built on the Web Serial API — no installation required. Send, receive, and log serial data directly in Chrome.
  
    USE CASES
    • Embedded development debugging (Arduino, ESP32, STM32, Raspberry Pi Pico)
    • Industrial equipment configuration (RS-232C, RS-485 via adapter)
    • IoT device communication
    • Modbus, AT commands, custom protocols
  
    KEY FEATURES
    • Serial Configuration — Baud rate, data bits, parity, stop bits, flow control, RTS/DTR signal control
    • Send/Receive Log — Timestamped logs with export (TXT/JSON/CSV), filtering, auto-save on disconnect
    • Send History — Press ↑/↓ to recall past commands (up to 50)
    • Quick Commands — One-click sending of frequent commands with drag & drop reordering
    • Macro Automation — SEND/WAIT/RETRY syntax for automated sequences with response timeout
    • Regex Alerts — Pattern-based alerts with audio notification
    • RX/TX Rate Display — Real-time bandwidth monitoring
    • Response Time Monitor — Latency measurement for command-response cycles
    • HEX Binary Send — Send arbitrary binary data via hex notation
    • Profile Management — Save and share connection profiles (import/export)
    • Multilingual — Japanese, English, Chinese, Korean, German, French, Spanish, Portuguese
  
    PERMISSIONS: Only "storage" — no network access whatsoever.

• May 5, 2026
  short_description

  A serial communication tool for sending and receiving data via COM ports

  Browser-based serial terminal using Web Serial API. Connect to COM ports, send/receive HEX/ASCII, run macros, log to TXT/JSON/CSV.

• May 5, 2026
  name

  Serial Communication Tool

  Serial Communication Tool - Web Serial

• Apr 23, 2026
  description

  [v1.4.0 NEW] Send history (↑↓ keys), Macro scripting (SEND/WAIT/RETRY), Regex alerts, RX/TX rate display, Drag & drop reorder, Auto-save on disconnect, Response time monitor, Per-command timeout, Auto-scroll pause
  
  Serial Communication Tool is a browser extension for communicating with PC COM ports (serial devices) using the Web Serial API. No dedicated software installation required — send, receive, and log serial data directly in Chrome.
  
  • Serial Communication — Configure baud rate, data bits, parity, stop bits, flow control, RTS/DTR signals
  • Send/Receive Log — Timestamped logs with export (TXT/JSON/CSV), filtering, and auto-save on disconnect
  • Send History [NEW] — Press ↑/↓ to recall past commands (up to 50)
  • Quick Commands — Register frequently used commands for one-click sending with drag & drop reordering
  • Macro Automation [NEW] — SEND/WAIT/RETRY syntax for automated sequences with response waiting and retries
  • Alert Monitoring — Keyword alerts with beep and highlight, regex pattern support
  • RX/TX Rate Display [NEW] — Real-time communication speed (bytes/sec) on the monitor strip
  • Response Time Measurement — Measures time from send to device response
  • HEX Binary Send — Send binary data in hexadecimal format
  • Profile Sharing — Import/export connection settings for team sharing
  • Auto-Connect — Automatic reconnection to previously used devices
  • Keyboard Shortcuts — Ctrl+D, Ctrl+L, Ctrl+Shift+S, /, ↑↓, Escape
  • Multi-language — Japanese, English, Chinese, German

  [v1.4.0 NEW] Send history (↑↓ keys), Macro scripting (SEND/WAIT/RETRY), Regex alerts, RX/TX rate display, Drag & drop reorder, Auto-save on disconnect, Response time monitor, Per-command timeout, Auto-scroll pause
  
  Serial Communication Tool is a browser extension for communicating with PC COM ports (serial devices) using the Web Serial API. No dedicated software installation required — send, receive, and log serial data directly in Chrome.
  
  • Serial Communication — Configure baud rate, data bits, parity, stop bits, flow control, RTS/DTR signals
  • Send/Receive Log — Timestamped logs with export (TXT/JSON/CSV), filtering, and auto-save on disconnect
  • Send History [NEW] — Press ↑/↓ to recall past commands (up to 50)
  • Quick Commands — Register frequently used commands for one-click sending with drag & drop reordering
  • Macro Automation [NEW] — SEND/WAIT/RETRY syntax for automated sequences with response waiting and retries
  • Alert Monitoring — Keyword alerts with beep and highlight, regex pattern support
  • RX/TX Rate Display [NEW] — Real-time communication speed (bytes/sec) on the monitor strip
  • Response Time Measurement — Measures time from send to device response
  • HEX Binary Send — Send binary data in hexadecimal format
  • Profile Sharing — Import/export connection settings for team sharing
  • Auto-Connect — Automatic reconnection to previously used devices
  • Keyboard Shortcuts — Ctrl+D, Ctrl+L, Ctrl+Shift+S, /, ↑↓, Escape
  • Multi-language — 8 languages: Japanese, English, Chinese, German, French, Portuguese (Brazil), Spanish (Latin America), Korean

Permissions & access

Permissions

storage

Host access

None declared

Screenshots

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