The Online Gray Code to Hexadecimal Converter is a tool that converts binary gray code to hexadecimal number system. Gray code is a non-weighted code where each consecutive value differs by only one bit, making it useful in certain applications such as position encoders and analog to digital converters. The conversion from gray code to hexadecimal is a simple process, but it can be time-consuming when done manually. This online tool provides a quick and easy solution for converting gray code to hexadecimal.