XML Formatter
Format and minify XML with proper indentation. Validate XML syntax, sort attributes, remove comments. Free online XML beautifier tool.
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How to Use XML Formatter
- Paste your XML code into the input textarea
- Select formatting options (indent size, remove comments, sort attributes)
- Click "Format" to beautify with proper indentation
- Click "Minify" to compress by removing whitespace
- Click "Validate" to check syntax without formatting
- Review formatted output and file size statistics
- Copy the processed XML to your clipboard
- Use "Load Sample" to test with example XML
About XML Formatter
The XML Formatter is a comprehensive tool for beautifying, minifying, and validating XML (eXtensible Markup Language) documents. Whether you're working with SOAP APIs, RSS feeds, configuration files, or data exports, this tool makes XML processing fast and easy.
XML remains crucial in enterprise software, web services (SOAP), configuration files, data exchange formats, and document standards (SVG, DOCX, RSS). However, XML is often minified for transmission or poorly formatted, making it difficult to read and debug. Our formatter solves these problems with intelligent parsing and customizable output options.
Formatting Features: - Smart Beautification: Proper indentation showing document structure - Minification: Compress XML by removing whitespace and comments - Validation: Instant syntax checking with error reporting - Attribute Sorting: Alphabetically sort element attributes - Comment Control: Option to preserve or remove XML comments - Configurable Indentation: Choose 2, 4, or 8-space indentation
Validation Capabilities: - Detects unclosed tags and tag mismatches - Identifies invalid attribute syntax - Finds malformed CDATA sections - Reports parsing errors with helpful messages
Common XML Use Cases: - SOAP Web Services: Format request/response XML for debugging - RSS/Atom Feeds: Beautify syndication feeds for editing - SVG Images: Format scalable vector graphics for manual editing - Configuration Files: Format web.config, app.config, pom.xml files - Data Export: Format XML exports from databases or applications - Android Layouts: Beautify Android XML layout files
This tool is perfect for API development, debugging SOAP services, editing configuration files, or learning XML syntax. All processing is done in your browser using the DOM Parser API, ensuring your XML data never leaves your device.
Common Use Cases
Frequently Asked Questions
Will formatting or minifying change my XML's meaning?
No! Formatting only changes whitespace (spaces, tabs, newlines) for readability. Minifying removes whitespace and optionally comments, but preserves all elements, attributes, and content. The XML Document Object Model (DOM) remains identical before and after processing.
Can this validate XML against a DTD or schema (XSD)?
No, this tool only performs basic syntax validation (well-formedness checking). It verifies that tags are properly opened/closed, attributes are quoted, and the structure is valid XML. For schema validation (DTD, XSD, RelaxNG), use specialized validators or XML editors like Oxygen XML or Altova XMLSpy.
What is the difference between well-formed and valid XML?
Well-formed XML follows basic syntax rules: proper tag nesting, quoted attributes, closed tags, etc. Valid XML is well-formed AND conforms to a specific schema (DTD or XSD). This tool checks well-formedness. Validity requires schema definition and specialized validation tools.
Can I format XML with namespaces?
Yes! The formatter handles XML namespaces (xmlns attributes) correctly. Namespaced elements and attributes are preserved during formatting. Example: <soap:Envelope xmlns:soap="..."> will format properly with namespaces intact.
Why should I sort attributes?
Sorting attributes alphabetically makes version control diffs cleaner and helps with consistency when multiple people edit the same XML. It's purely cosmetic and doesn't affect XML semantics. Some teams enforce sorted attributes as a code style rule.
Can this handle very large XML files?
For optimal performance, keep files under 5MB. The browser's DOM Parser handles most XML documents quickly, but very large files (100MB+ database exports) may cause slowdowns. For massive XML files, consider command-line tools like xmllint or XML editors designed for large document processing.
What are CDATA sections and how are they handled?
CDATA sections (<![CDATA[...]]>) contain character data that should not be parsed as XML. They're used for embedding code, HTML, or special characters. The formatter preserves CDATA sections exactly as-is without modifying their contents.
Can I format broken or invalid XML?
The formatter will try, but results may be unexpected. If XML has syntax errors (unclosed tags, invalid characters), the validation step will report errors. Fix the errors first, then format. For badly mangled XML, you may need manual editing before using an automated formatter.
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