What makes this XML formatter different from others?

Our XML formatter includes unique features like real-time XSD validation, visual tree navigation, XPath querying with auto-completion, XML diff comparison, automatic XSD generation, namespace management, and XML transformation capabilities. It's designed for both developers and enterprise users.

Can I format extremely large XML files?

Yes! Our formatter is optimized for performance and can handle large XML files efficiently. The progressive rendering and memory optimization ensure smooth operation even with files up to 50MB. We also include features to handle XML fragments and streaming.

Does the formatter support XML with DTD and namespaces?

Absolutely! Our formatter fully supports XML namespaces, DTD validation, and complex XML structures. You can manage namespace prefixes, validate against DTDs, and work with mixed-content XML seamlessly.

How accurate is the XSD validation?

Our XSD validation uses industry-standard XML Schema validation with additional custom rules. It provides detailed error messages, line numbers, and suggestions for fixing invalid XML structures against your XSD schemas.

Can I transform XML to other formats?

Yes! We include built-in transformation capabilities to convert XML to JSON, CSV, and HTML formats. You can also apply XSLT transformations and customize the output formatting for each target format.

What security measures are in place?

All XML processing happens locally in your browser - no data is sent to our servers. We include security features like entity expansion protection, maximum depth limits, and size restrictions to prevent XML-based attacks like billion laughs or quadratic blowup.

Advanced XML Processing Toolkit

Free Online XML Formatter & Validator

Transform your XML workflow with our comprehensive formatter featuring real-time XML formatting and validation, interactive tree visualization, powerful XPath query engine, XSD schema generator, XML transformation to JSON/CSV/HTML, side-by-side diff comparison, advanced namespace management and analysis, performance analysis and metrics, import/export file support, syntax highlighting with error detection, history and favorites management, and multiple formatting options—essential for developers, enterprise systems, data integration, and any XML processing task.

Advanced XML Formatter & Validator

Format, validate, analyze, and transform XML with advanced tools including XSD generation, XPath querying, diff comparison, and namespace management

Input XML

Import File

Formatted XML

Formatting Options

Indentation: 2 spaces

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XML Examples & Templates

Quick-start templates and examples for common XML structures and use cases