A hex editor is a specialized software tool that allows users to view and edit the raw binary data of files. It displays the data in hexadecimal format, which represents the binary values in a more human-readable way. This is useful for programmers, data recovery specialists, and anyone needing to manipulate file contents at a low level, such as modifying executable files or analyzing file structures. Hex editors can also be used for debugging software, as they provide insights into how data is stored and organized. They often include features like search functions, data comparison, and the ability to edit specific bytes. Popular examples of hex editors include HxD and Hex Fiend.