XML Formatter & Validator
Format, validate, and beautify XML documents with our powerful online tool. Perfect for web development, data processing, and configuration management.
XML Formatter & Validator
Formatted XML will appear here...
Professional XML formatting and validation tool!
Perfect for web services, configuration files, and data processing workflows
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. XML is designed to store and transport data.
- XML stands for eXtensible Markup Language
- XML is a markup language much like HTML
- XML was designed to store and transport data
- XML was designed to be self-descriptive
- XML is a W3C Recommendation
XML Formatting Benefits
Formatted XML Benefits
- Improved readability for humans
- Easier debugging and troubleshooting
- Better structure visualization
- Simplified code reviews
- Enhanced documentation clarity
- Better version control diffs
Minified XML Benefits
- Reduced file size and bandwidth usage
- Faster data transmission over networks
- Improved application performance
- Lower storage requirements
- Optimized for production environments
- Reduced parsing time
XML Syntax Rules
All XML Elements Must Have a Closing Tag
In HTML, some elements do not have to have a closing tag. In XML, all elements must have a closing tag.
❌ Invalid:
<message>Hello World✅ Valid:
<message>Hello World</message>XML Tags are Case Sensitive
XML tags are case sensitive. The tag <Letter> is different from the tag <letter>.
❌ Invalid:
<Message>Hello</message>✅ Valid:
<message>Hello</message>XML Elements Must be Properly Nested
XML elements must be properly nested within each other.
❌ Invalid:
<b><i>Bold italic</b></i>✅ Valid:
<b><i>Bold italic</i></b>XML Attribute Values Must be Quoted
XML attribute values must always be quoted.
❌ Invalid:
<person id=123>John</person>✅ Valid:
<person id="123">John</person>XML Document Structure
<?xml version="1.0" encoding="UTF-8"?>
<!-- XML Declaration -->
<!-- Root element (required) -->
<bookstore>
<!-- Child elements -->
<book id="1" category="fiction">
<title lang="en">Great Gatsby</title>
<author>F. Scott Fitzgerald</author>
<year>1925</year>
<price currency="USD">10.99</price>
</book>
<book id="2" category="fiction">
<title lang="en">1984</title>
<author>George Orwell</author>
<year>1949</year>
<price currency="USD">8.99</price>
</book>
</bookstore>Common XML Use Cases
Web Services
SOAP web services, REST APIs, and data exchange between systems
Configuration Files
Application settings, build configurations, and deployment descriptors
Data Storage
Structured data storage, database exports, and data interchange
Document Markup
XHTML, DocBook, and structured document formats
Message Queues
Message formats for enterprise service buses and messaging systems
Reports & Feeds
RSS feeds, sitemaps, and structured report generation
XML Namespaces
XML namespaces provide a method to avoid element name conflicts when combining XML documents from different sources.
<?xml version="1.0"?>
<root xmlns:h="http://www.w3.org/1999/xhtml"
xmlns:f="http://www.w3schools.com/furniture">
<h:table>
<h:tr>
<h:td>Apples</h:td>
<h:td>Bananas</h:td>
</h:tr>
</h:table>
<f:table>
<f:name>African Coffee Table</f:name>
<f:width>80</f:width>
<f:length>120</f:length>
</f:table>
</root>Related Code & Data Tools Tools
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