online
Port Checker — online
Check if a port is open or closed on any host.
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Server-Side Tool
Port Checker requires making HTTP requests to external servers, which is blocked by browser security policies (CORS). This feature requires a server-side implementation.
Coming Soon
We are building a backend API to support this tool. Check back soon!
In the meantime, try these alternatives:
- Use browser developer tools (F12 → Network tab)
- Check online services like MXToolbox, Cloudflare Radar
- Use curl or wget from your terminal
How to use Port Checker
1
Enter Host
Type the hostname or IP address to check.
2
Enter Port
Enter the port number you want to check.
3
View Result
See if the port is open or closed.