Port Checker
Check whether common network ports (HTTP, SSH, FTP, MySQL…) on a host are open by attempting WebSocket connections from your browser. Results are most reliable for HTTP-based services.
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Note: browsers can only probe via WebSocket/HTTP, so results are most accurate for HTTP-based services (80, 443, 8080…).
Enter a host to start.
Frequently asked questions
Can this replace telnet?
Not fully. Browsers cannot open raw TCP connections, so this tool probes via WebSocket — accurate for HTTP-based services but less reliable for other protocols.
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