Serial Terminal
Free web-based Serial Terminal and serial monitor directly in your browser. Connect via Web Serial API to any COM port, USB-UART adapter, or serial interface, send commands, and analyze data in real time without installation.
Advanced Send, HEX & MacrosOptionalTransmit structured strings or raw hex bytes, store quick macros, or run interval pinging.
How does this tool work?
Professional browser-based Serial Terminal providing direct bidirectional communication with any serial device, microcontroller, modem, embedded system, or USB-to-UART interface via the modern Web Serial API. Runs locally and without desktop software installation.
Supports standard and custom baud rates from 300 to 2,000,000+ baud; real-time interactive character streaming with local echo; full ANSI/VT100 graphic rendition (16-color, 256-color palette, 24-bit TrueColor RGB, bold, italic, underline); raw HEX dump inspector for binary protocols; configurable UART framing (data bits, stop bits, parity, hardware RTS/CTS flow control); hardware handshake lines (DTR, RTS, CTS, DSR, CD, RI); automatic copy-on-select (Auto-Copy); full-screen Focus Mode; quick commands/macros; command history navigation; live text filtering and log file export.
Where are my data processed?
Only in your browser. Your data is not sent to any server.
The tool calculates and converts with JavaScript right on your device. Input and files are not sent to us or anyone else. You can check this yourself: load the page, disconnect from the internet, and the tool keeps working in the open tab.