port-check

PortforwardCheck - GUI app for Windows to correctly check if port is open/accessible, separately for TCP and UDP.

📡 Check whether hosts are reachable on certain ports and return result on HTTP

Mullvad CLI to check if you're secured - Unofficial tool

Tiny utility for checking ports availability

Simple lightweight application to check if a port is open on a given ip, using ElectronJS.

PowerShell script that proves a declared list of firewall paths is open: probes each source, target and port once, returns a pass/fail matrix and HTML, CSV and JSON reports, and exits non-zero when a required path fails.

Modular netstalking tools

Alert when some forbidden words are in emails

Official TCPLab browser extension — one-click IP, DNS, TLS and port checks for the page you're on. Built with WXT + Vue 3.

Python3 Utils collection

A simple program that checks the status of network ports.

A library for help webpack devserver find usable port when has port conflict.

Check whether a port listener runs from the Git worktree you are testing

Monitors port reachability with notifications via Telegram and Gotify

Reverse IP lookup and open-port checks via YouGetSignal. Two small Python scripts, no dependencies.

PHP Web Tools