XML Formatter & Validator
XML formatting adds indentation and line breaks to make XML human-readable. Minified: <root><item>A</item><item>B</item></root>. Formatted: proper indentation, attributes aligned, closing tags clear. Validation checks well-formedness: matching tags, proper nesting, unique attributes, entity encoding (< → <, & → &). XML is case-sensitive, requires root element, self-closing tags end with />. Use in SOAP APIs, configuration files (web.config, pom.xml), data interchange, RSS feeds. Tools: xmllint, prettier, VS Code.
Format, beautify, minify, and validate XML online. Configurable indentation (2/4 spaces, tabs), syntax highlighting, tree view, and error reporting with line numbers. Handles CDATA, comments, attributes, and namespaces.
Works OfflineDark ModeNo Ads
Input XML
How to Use
- Enter your value in the input field
- Click the Calculate/Convert button
- Copy the result to your clipboard
Frequently Asked Questions
- What is XML and how is it different from JSON?
- XML (eXtensible Markup Language) is a markup language for storing and transporting structured data. Unlike JSON, XML supports attributes, namespaces, CDATA sections, comments, and processing instructions. XML is more verbose but offers stronger schema validation and is widely used in enterprise systems, SOAP APIs, and configuration files.
- How do I format or prettify XML?
- Paste your XML into the input field and click Format. Choose your preferred indentation (2 spaces, 4 spaces, or tabs) from the dropdown. The formatter will add proper line breaks and indentation while preserving CDATA sections, comments, and attributes.
- How do I minify XML?
- Select the Minify mode toggle, then click Minify. This removes all unnecessary whitespace between tags, producing a compact single-line output that is smaller in size but harder to read.
- What does the XML tree view show?
- The tree view displays the hierarchical structure of your XML document. Each element is shown as a collapsible node with its tag name, attributes, and namespace. Text content, CDATA sections, and comments are shown inline. Click nodes to expand or collapse them.
- How does XML validation work?
- The validator uses the browser DOMParser to check if your XML is well-formed. It reports syntax errors with line and column numbers when available. Note that this checks well-formedness (proper tag nesting, matching quotes, etc.) but does not validate against an XSD or DTD schema.
- Does this tool handle XML namespaces?
- Yes, the formatter preserves namespace prefixes and declarations (e.g., xmlns:dc="...") in both formatted output and tree view. The tree view also shows the namespace URI for each element.