Colasoft Packet Builder is a powerful tool designed for network administrators to create and customize information packets for network testing and security assessment. This advanced application allows you to define the protocol, craft packets with specific data, and send them to observe network responses. It supports various connection protocols including Ethernet, ARP, IP, TCP, and UDP, with a range of predefined packet templates for convenience. The packets are fully customizable using both a hexadecimal and an ASCII editor, ensuring they meet your precise requirements. Enhance your network's reliability and security with Colasoft Packet Builder.




I had a mixed experience with Packet Builder. While it offers solid functionalities, I ran into a few bugs that were frustrating. Support was helpful, but I expected better stability. It’s good, but there’s room for improvement.