Network Tools
Check whether a specific port is open on a host and reachable over the network.
Use this port checker to test whether a target host is listening on a specific port. It is useful for troubleshooting service availability, confirming whether a firewall may be blocking access, checking whether an app is exposed on the expected port, and verifying connectivity to common TCP services.
Use this port checker to test whether a target host is listening on a specific port. It is useful for troubleshooting service availability, confirming whether a firewall may be blocking access, checking whether an app is exposed on the expected port, and verifying connectivity to common TCP services.
Use port checker when you need a fast browser-based result without extra setup. It works well for quick checks, one-off tasks, and routine formatting or calculation work.
Read step-by-step usage guidance, best practices, and common mistakes.
See common questions and answers about input, output, and tool usage.
Review practical input and output examples before running the tool.
Find similar and supporting tools for adjacent actions and follow-up tasks.
Input
example.com:443
Output
Port check result for the target host and port
Useful for checking whether HTTPS is reachable on the expected port.
Input
192.168.1.10:22
Output
Port check result for the target host and port
Useful when checking local SSH reachability.
Fix: Add the specific port you want to test.
Fix: Remember that host reachability does not mean the target service port is open.
Fix: Check whether a service is actually listening on that port before blaming the firewall.
A port checker tests whether a specific network port is open and reachable.
It may be blocked by a firewall, filtered, or not have a listening service.
Use it when you need to know whether a host is accepting connections on a specific port.
Yes. It works online in the browser.
Ping tests general reachability, while a port checker tests whether a specific service port responds.