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// Network Tool

Port Checker

Check if TCP ports are open from your browser
Common Ports
Connecting…
Connection Log
— awaiting check —
⚠ Browser Limitation: Browsers cannot open raw TCP sockets. This tool uses WebSocket/HTTP probing — a port may show as open if it accepts HTTP/WS connections, or filtered/closed if it rejects or times out. For accurate results on arbitrary ports, use this alongside a server-side checker or nmap.
Host
Ports (comma-separated or range like 20-25)
⚠ Browser Limitation: Same TCP constraint applies. Max 50 ports per scan to avoid browser rate-limiting.