XML Validator & Formatter
Validate, beautify, and debug XML strings. Instantly catch syntax errors and format chaotic XML into readable code.
Input XML
Output / Result
Valid XML
XML Validator & Formatter
Validate, beautify, and debug XML strings. Instantly catch syntax errors and format chaotic XML into readable code.
About XML Validator & Formatter
XML Validator & Formatter is an essential utility for developers, data analysts, and sysadmins working with Extensible Markup Language (XML). Complex XML structures, especially those generated automatically or pulled from old enterprise APIs, can be incredibly difficult to read and debug. This tool serves a dual purpose: First, it acts as a strict validator, parsing your raw input using native browser XML parsers to catch syntax errors, missing closing tags, and invalid structural characters. Second, if the XML is valid, it beautifies the string with proper indentation and line breaks, transforming an unreadable wall of text into a clean, hierarchical tree. Because it relies on the DOMParser API built into your browser, all formatting and validation happens instantaneously and completely offline.
Key Benefits
- Validate XML for syntax and structural errors.
- Beautify and indent chaotic XML strings.
- Instantly pinpoint the line number of parsing errors.
- Download or copy the formatted result instantly.
How to use
- Input XML
Paste your raw or minified XML into the editor.
- Review Errors
If invalid, the tool will highlight the exact parsing error and line number.
- Format Data
If valid, the tool automatically beautifies the XML with proper indentation.
- Export
Copy the formatted text or download it directly as an .xml file.
Frequently Asked Questions
Is my XML data sent to a server?
No. The validation and formatting are powered by your browser's native DOMParser, meaning your sensitive data is perfectly safe.
Can it validate against an XSD?
This tool performs 'Well-Formedness' syntax validation, not XSD schema validation.
Will it fix my broken XML?
The tool will format valid XML, but it will not automatically guess and insert missing tags for severely broken XML. It will, however, tell you exactly where the error is.
Is there a file size limit?
Since it processes locally, it is limited only by your computer's available memory.