XML Formatter
Pretty-print and validate XML with proper nesting and indentation.
Paste XML to see formatted output…
Features
Pretty-print
Format XML with configurable 2 or 4 space indentation for clean, readable output.
XML Declaration
Optionally include the standard XML declaration header with encoding information.
Syntax Validation
Real-time validation using the browser's built-in XML parser with error location reporting.
Proper Nesting
Correctly handles self-closing tags, text nodes, comments, and complex nested structures.
All processing happens locally in your browser. No data is sent to any server.
Technical Specification
XML Formatting Engine & Structural Pretty-Printing
Overview
The ToolsForges XML formatter transforms minified, malformed, or inconsistently indented XML documents into human-readable, properly structured markup with configurable indentation and line breaks. Paste your XML string, select an indentation depth, and receive a clean, formatted output that exposes structural errors, mismatched tags, and malformed entities.
Feature Specifications
- Configurable IndentationChoose between two, four, or eight spaces, or tab-based indentation to match your project's coding style guide. The formatter applies consistent indentation throughout the entire document.
- Syntax Error DetectionParse and validate XML structure in real time, reporting mismatched tags, unclosed elements, malformed entities, and attribute syntax errors with precise location indicators.
- Attribute FormattingFormat XML attributes with consistent spacing, quote style, and line-wrapping for long attribute lists, improving readability of complex element declarations.
- Copy and Download ExportCopy the formatted XML to your clipboard or download it as a file with a single click, ready for use in configuration files, data feeds, or document processing pipelines.
Architecture
The formatter uses React useState for input management and the browser's DOMParser API for syntax validation. The custom serializer traverses the parsed DOM tree, applying indentation rules and whitespace formatting to produce clean output.
Frequently Asked Questions
Does the formatter handle XML namespaces?
Yes. The formatter preserves XML namespace declarations and prefixed elements, maintaining correct namespace binding throughout the formatted output.
Can I format SOAP or XSD documents?
Yes. The formatter processes any well-formed XML document, including SOAP envelopes, XSD schema definitions, and other specialized XML vocabularies.
What is the maximum XML size supported?
The formatter handles documents up to several megabytes efficiently. Very large XML files may experience brief processing delays depending on document complexity.
Is my XML data stored?
No. All XML content is processed in-memory within your browser. No document data, configuration files, or markup content is transmitted to external servers.