Colasoft Packet Builder is useful tool used for creating custom network packets, you can use this tool to check your network protection against attacks and intruders. Colasoft Packet Builder provides you very powerful editing feature, besides common HEX editing raw data, it featuring a Decoding Editor which allows you edit specific protocol field value much easier. In addition to building packets, Colasoft Packet Builder also supports saving packets to packet files and sending packets to network.

There are three views in the Packet Builder, they are Packet List, Decode Editor, and Hex Editor.

The Packet List displays all constructed packets, when you select one or more packets in Packet List, the first highlighted packet will displays in both Decode Editor and Hex Editor for editing.

In the Hex Editor, the data of the packet is represented as hexadecimal values and ASCII characters, nonprintable characters are represented by a dot "." in the ASCII part. you can either edit the hexadecimal values or the ASCII characters.

The Decode Editor is a unique feature in Colasoft Packet Builder, editing in decode editor allows you to edit packets without remembering value length, byte order and offsets, you just simply select a field, and change value in the edit box.