Tools

Serial monitor

Talk to an ESP32, Arduino or any serial device from the browser.

A serial terminal that needs no installation. Connect a board over USB, pick the port and baud rate, and read the output live. Send commands, pause the display, add timestamps and save the log as a text file. It uses the Web Serial API, so it runs in Chrome, Edge and other Chromium browsers on a desktop computer.

Open the serial monitor

Baud rates from 1,200 to 2,000,000
Send commands with history and a choice of line ending
Pause, timestamps and auto-scroll
Board reset over DTR/RTS
Remembers baud rate, line ending and command history in this browser
Installable as an app; works offline
Save the log as .txt; nothing leaves your computer

Needs a browser with Web Serial: Chrome, Edge or Opera on Windows, macOS or Linux. Firefox and Safari do not support it.