Web Serial Monitor

Talk to a serial port straight from the browser (Web Serial): send/receive, HEX / text / ANSI colour log, packet merging, quick commands and auto-reconnect.

This browser has no Web Serial support. Use desktop Chrome or Edge (Safari and Firefox don't ship it).

Port

ClosedNo port selected

Baud rate

Data bits

Stop bits

Parity

Flow control

Log

RX 0 BTX 0 B0 /200

Timestamp

Auto scroll

Merge gapms

Once the port is open, everything sent and received shows up here, one line per packet.

Send

Append CRLF

Repeatms

Open the port first to send

Quick commands

Click to send; entries marked HEX are parsed as hex.

HEX

Port settings, display options and quick commands live in your browser and can be exported.

Notes

Data only travels between this browser and the local port — no server involved, EmbedKit has no backend.

HEX mode shows raw bytes (use it for binary protocols); text mode decodes UTF-8.

ANSI mode renders colour escapes from device logs (via ansi_up, HTML escaped).

Unplugging shows “Disconnected”; replugging reconnects with the last settings unless you closed it by hand.

The log keeps the last 200 entries so long captures don't freeze the page.