TCP Client / Netcat
Open a raw TCP socket to any host and port, send text and watch the reply — like netcat in your browser.
Overview
A web-based raw TCP client (netcat / telnet style). Connect to any host and port, optionally over TLS, then grab the server's banner and send text — HTTP requests, SMTP/IMAP/POP3 commands, Redis, Gopher, finger, or your own line protocol — and read the response. Perfect for probing open ports, testing a service handshake, or checking what a daemon says when you connect. Signed in, you can reach private / LAN / localhost hosts and save endpoints that sync across devices. Signed out, the connection is one-time, public-host only, and never stored.