Network Tools • Free Online Tool

Open Port Checker

Check if a specific port is open or closed on a remote host

Free to Use No Sign-Up Browser-Based
Online Tool

Open Port Checker

Ready
21
FTP
22
SSH
23
Telnet
25
SMTP
53
DNS
80
HTTP
110
POP3
143
IMAP
443
HTTPS
3306
MySQL
5432
PostgreSQL
8080
HTTP Proxy
Our Open Port Checker tool allows you to quickly verify if a specific TCP port is open or closed on any remote host. This is useful for network diagnostics, security auditing, and troubleshooting server connectivity issues.
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