An XML editor is a software application designed to create, edit, and manage XML (eXtensible Markup Language) files. These editors provide features like syntax highlighting, validation, and auto-completion, making it easier for users to write and maintain structured data. They are commonly used in web development, data interchange, and configuration files. Many XML editors support various XML standards and can integrate with other tools, enhancing productivity. Some popular examples include Notepad++, Oxygen XML Editor, and XMLSpy. These tools cater to both beginners and advanced users, offering a range of functionalities to suit different needs.