Description

Port Checker is a fast, practical web app that helps developers, system administrators, and IT teams verify whether a network port is open, closed, or filtered in seconds. Built for real-world troubleshooting, it removes guesswork from connectivity checks and makes it easy to diagnose firewall rules, router settings, cloud security groups, and service availability from one clean interface.

Whether you are deploying a new server, configuring SSH or RDP access, testing game server ports, validating mail service ports (SMTP/IMAP/POP3), or checking database endpoints, Port Checker gives you immediate, actionable results. Simply enter a host and port, run the test, and get a clear status report you can use to fix issues quickly.

The app is designed to be lightweight, responsive, and beginner-friendly while still useful for advanced users. It supports common TCP port validation workflows and is ideal for DevOps checks, homelab setups, remote work troubleshooting, and incident response. Instead of juggling multiple command-line tools, users get a straightforward online port testing experience that works across desktop and mobile devices.