HxD is a free hex editor that allows users to view and edit binary files. It provides a user-friendly interface for examining the raw data of files, making it useful for programmers, data recovery specialists, and anyone needing to manipulate file contents at a low level. In addition to basic editing features, HxD includes tools for searching, comparing files, and analyzing disk drives. It supports various file formats and can handle large files efficiently, making it a versatile tool for tasks such as debugging, reverse engineering, and forensic analysis.