This is unique to version 12. A hex editor pane lets you craft raw IP packets, set SYN flags, ACK flags, and even spoof source IPs (though ethical warnings pop up). This moves Netcat GUI 12 into the territory of hping3 or scapy .
Whether you are a penetration tester, a backend developer, a network engineer, or a curious student, Netcat GUI 12 will save you hours of typing and debugging. netcat gui 12