Port Scanner

Check if a specific port is open on a host, with common port quick-check. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Hostname / IP

Port

Note: Due to browser CORS security restrictions, port check results are for reference only. This uses fetch with no-cors mode; an opaque response suggests the service may be responding, but cannot be confirmed. More accurate detection requires server-side tools.