XML Validator Online - Free XML Syntax Checker & Validation Tool

Validate XML Documents Online - Check XML Syntax & Structure

Validate XML documents instantly with our powerful online XML validator. Check XML syntax, verify document structure, and ensure well-formedness with detailed error reporting and comprehensive validation results. Perfect for developers, data analysts, and anyone working with XML files, web services, configuration files, and data exchanges.

Key Features:

✅ Instant XML syntax validation and error detection
✅ Real-time XML structure checking
✅ Detailed error messages with line and column information
✅ Document statistics (elements, attributes, depth)
✅ Well-formedness verification
✅ XML namespace support
✅ File upload support (.xml, .txt files)
✅ Sample XML data for testing
✅ Copy and download functionality
✅ Professional validation interface
✅ No registration or software installation required

XML Validation Checks:

🔍 XML syntax validation and error detection
📋 Document structure verification
🏷️ Tag matching and proper nesting
📝 Attribute syntax validation
🔤 Character encoding verification
🌳 Single root element validation
📊 Document statistics analysis
⚠️ Comprehensive error reporting

Use Cases:

🔧 XML configuration file validation
🌐 Web service XML response validation
📱 Android manifest and layout file checking
⚙️ Maven POM file validation
🌸 Spring configuration file verification
📊 Database XML export validation
📋 XML data feed verification
🔄 API XML payload validation
📄 SOAP message validation
🧪 XML development and testing

Why Use Our XML Validator?

🚀 Fast and accurate XML validation
🎯 Detailed error reporting with specific locations
📊 Comprehensive document analysis and statistics
🔒 Secure - all validation happens in your browser
💰 Completely free with no registration required
📱 Works on desktop, tablet, and mobile devices
⚡ Real-time validation with instant results
🔧 Professional-grade XML validation tools

Start validating your XML documents immediately with our professional XML validator. Upload XML files, paste XML content, or use sample data to test the validation capabilities. Get instant feedback on XML syntax errors, structural issues, and document statistics. No account creation or software installation required.

Whether you are a developer working with XML APIs, a system administrator validating configuration files, or someone who needs to verify XML document integrity, our online XML validator provides the professional tools and detailed analysis you need to ensure your XML documents are well-formed and valid.

XML Validator & Checker

Validate XML syntax, check structure, and analyze XML documents

XML Input

Upload

Loading editor...

Validation Results

XML validation results will appear here

Paste XML in the input area to start validation

How to Validate XML - Step by Step Guide

Step 1

Input Your XML Document

Start by entering your XML document into the validator. You can paste content, upload files, or use sample data.

•

Paste XML content: Copy XML from configuration files, web services, or applications

•

Upload XML files: Select .xml or .txt files from your computer for validation

•

Use sample XML: Click "Sample" to load example XML for testing the validator

Example: Valid XML Document

Here's a well-formed XML document that will pass validation:

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
  <database>
    <host>localhost</host>
    <port>5432</port>
  </database>
</configuration>

Step 2

Review Validation Results

The validator instantly analyzes your XML and provides detailed feedback on syntax, structure, and well-formedness.

•

Syntax validation: Checks for proper XML syntax and structure

•

Error reporting: Detailed error messages with line and column numbers

•

Document statistics: Information about elements, attributes, and structure depth

Step 3

Fix Issues and Re-validate

If validation errors are found, use the detailed error information to fix issues and re-validate your XML document.

•

Error location: Precise line and column information for each error

•

Helpful suggestions: Clear explanations of what needs to be fixed

•

Real-time validation: Instant feedback as you make corrections

Frequently Asked Questions

What does XML validation check for?

XML validation checks for syntax errors, well-formedness, proper tag nesting, attribute formatting, character encoding issues, and compliance with XML standards (XML 1.0/1.1).

Can this validator handle XML with namespaces?

Yes! The validator fully supports XML namespaces, namespace prefixes, default namespaces, and validates namespace declarations and usage throughout your XML document.

What happens if my XML has errors?

The validator provides detailed error messages with line numbers and character positions, explaining exactly what's wrong and offering suggestions for fixing the issues. Once fixed, you can format the XML for better readability.

Does this tool validate against XML Schema (XSD)?

This tool focuses on XML well-formedness validation. For XSD schema validation, you would need specialized schema validation tools that check against specific schema definitions.

Is this XML validator completely free?

Yes, completely free with no file size limits, no registration required, and unlimited usage. All validation features and error reporting are available at no cost.