We all know that computers and digital machines work on binary digit principle. This is a language which is understandable but computing devices and consists of only two digits 0 and 1. Various combinations give different words that we humans can understand. Like binary code to show “a” on screen is 01000100. Well, now the library of the words is this vast that these binary digits arrange themselves and forms Hexadecimal digits. These digits are all over our device and are operating at each click, each word or anything we do on the computer or any digital device. To edit these codes, some softwares are made, and those are called Hex editors. These software are high-end softwares and are used by professionals. One can change the code of showing “a” using these software and pretty much, alter the whole operating system with it. The person must have a vast knowledge of Binary units to operate in the software. A list of free Hex editing software is provided from which you can choose whichever suits you the best. However, some of the software only come in a trial version for free and are purchasable later for full functionality.