XML Formatter
Format, beautify, and validate XML data. Free online XML formatter with syntax highlighting and error detection.
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What is XML?
XML (eXtensible Markup Language) is a markup language that defines a set of rules for encoding documents in a format that is both human-readable and machine-readable. It is widely used for data serialization, configuration files, and communication between systems.
XML Structure
- Prolog: Optional declaration like <?xml version="1.0"?>
- Elements: Defined by opening and closing tags, e.g., <tag>value</tag>
- Attributes: Provide additional data inside the opening tag, e.g., <tag id="1">
- Root Element: Every XML document must have exactly one root element.
- Well-formedness: Tags must be properly nested and closed.
Frequently Asked Questions
XML formatting (or beautifying) adds consistent indentation and line breaks to XML documents, making them easier to read, debug, and edit. It does not change the data or structure of the document.