Free Port Checker — Test Open Ports Online

The Port Checker tests whether a specific TCP port is open and accepting connections on a given host. Useful for verifying firewall rules, confirming service availability, debugging connection issues, and checking which ports are exposed. Enter a host and port number to test instantly. Free, no account needed.

1. 1

   Enter the hostname or IP address you want to test.

2. 2

   Enter the port number you want to check (e.g., 80, 443, 22).

3. 3

   The result shows whether the port is open, closed, or filtered.