Convert JSON to XML Instantly (Custom Tags, Pretty Printed)

Quick Start Guide

1. Paste JSON: Copy your JSON data into the input area
2. Configure Options: Set root element name, indent size, and XML declaration
3. Convert: Click "Convert to XML" to transform your JSON
4. Copy or Download: Use the output buttons to copy or download the XML
5. Try Examples: Click example buttons to see different conversion scenarios

What is JSON to XML Conversion?

JSON to XML conversion transforms JSON (JavaScript Object Notation) data into XML (eXtensible Markup Language) format, enabling compatibility with systems that require XML input.

Purpose: API integration, legacy systems, SOAP services, data exchange Input: JSON data with objects and arrays Output: Well-formed XML with proper structure Usage: Enterprise integration, web services, data migration

Why Convert JSON to XML?

Integration Benefits:

• Connect modern JSON APIs to legacy XML systems
• Generate XML for SOAP web services
• Create configuration files in XML format
• Support systems that only accept XML input
• Transform REST API responses to XML
• Enable data exchange with enterprise systems

Common Scenarios:

• Integrating with SOAP-based web services
• Legacy enterprise system integration
• Converting REST API data for XML-based systems
• Generating XML configuration files from JSON
• Data migration between formats
• Supporting older APIs that require XML

JSON vs XML

JSON (JavaScript Object Notation):

• Lightweight and compact
• Native to JavaScript
• Easy to read and write
• Better for web APIs
• Smaller file sizes
• Direct mapping to programming objects

XML (eXtensible Markup Language):

• More verbose with opening/closing tags
• Schema validation support (XSD)
• Better for document markup
• Industry standard for enterprise systems
• Supports attributes and namespaces
• SOAP web services requirement

When to use XML:

• Legacy system requirements
• SOAP web service integration
• Schema validation needed
• Document-oriented data
• Enterprise B2B integration
• Regulatory compliance requirements

Conversion Options Explained

Root Element

Purpose: The outermost XML tag that wraps all content

Default: "root"

<root> <user>...</user> </root>

Custom (e.g., "response"):

<response> <user>...</user> </response>

Best practices:

• Use descriptive names (users, products, config)
• Follow XML naming conventions (alphanumeric, no spaces)
• Match your target system requirements
• Be consistent across your application

Indent Size

2 spaces (recommended):

• Clean, readable output
• Standard for many XML tools
• Smaller file size than 4 spaces

4 spaces:

• More visual hierarchy
• Easier to see nesting levels
• Common in enterprise systems

Compact (0 spaces):

• Minimal file size
• Single-line output
• Best for transmission, not readability

XML Declaration

Enabled (recommended):

<?xml version="1.0" encoding="UTF-8"?> <root>...</root>

Disabled:

<root>...</root>

When to include:

• Standalone XML files
• XML that will be saved to disk
• Systems that expect declaration
• Production XML documents

When to omit:

• XML fragments
• Embedding in other documents
• APIs that reject declarations

Common Use Cases

1. Simple Object Conversion

Purpose: Convert basic JSON object to XML

Before (JSON):

{ "user": { "id": 1, "name": "John Doe", "email": "john@example.com" } }

After (XML):

<?xml version="1.0" encoding="UTF-8"?> <user> <id>1</id> <name>John Doe</name> <email>john@example.com</email> </user>

2. Array Conversion

Purpose: Convert JSON arrays to repeated XML elements

Before (JSON):

{ "users": [ {"id": 1, "name": "Alice"}, {"id": 2, "name": "Bob"}, {"id": 3, "name": "Charlie"} ] }

After (XML):

<?xml version="1.0" encoding="UTF-8"?> <users> <user> <id>1</id> <name>Alice</name> </user> <user> <id>2</id> <name>Bob</name> </user> <user> <id>3</id> <name>Charlie</name> </user> </users>

Note: Array items automatically use singular form of parent tag.

3. Nested Objects

Purpose: Convert deeply nested JSON structures

Before (JSON):

{ "company": { "name": "Tech Corp", "address": { "street": "123 Main St", "city": "San Francisco", "state": "CA" } } }

After (XML):

<?xml version="1.0" encoding="UTF-8"?> <company> <name>Tech Corp</name> <address> <street>123 Main St</street> <city>San Francisco</city> <state>CA</state> </address> </company>

4. API Response to XML

Purpose: Transform REST API JSON response to XML

Before (JSON):

{ "status": "success", "code": 200, "data": { "userId": 12345, "message": "User created" } }

After (XML):

<?xml version="1.0" encoding="UTF-8"?> <root> <status>success</status> <code>200</code> <data> <userId>12345</userId> <message>User created</message> </data> </root>

5. Configuration File

Purpose: Create XML config from JSON

Before (JSON):

{ "config": { "database": { "host": "localhost", "port": 5432 }, "cache": { "enabled": true, "ttl": 3600 } } }

After (XML):

<?xml version="1.0" encoding="UTF-8"?> <config> <database> <host>localhost</host> <port>5432</port> </database> <cache> <enabled>true</enabled> <ttl>3600</ttl> </cache> </config>

6. Mixed Data Types

Purpose: Handle different JSON data types

Before (JSON):

{ "product": { "name": "Laptop", "price": 999.99, "inStock": true, "rating": null } }

After (XML):

<?xml version="1.0" encoding="UTF-8"?> <product> <name>Laptop</name> <price>999.99</price> <inStock>true</inStock> <rating /> </product>

Note: Null values become self-closing tags.

Features

Core Functionality

• Complete JSON Parsing: Handles all JSON data types
• Nested Structure Support: Unlimited nesting depth
• Array Handling: Automatic singular tag names
• XML Escaping: Proper character encoding
• Custom Root Element: Configurable wrapper tag
• Formatting Options: Indentation control

Data Type Conversion

Primitives:

• Strings → text content
• Numbers → text content
• Booleans → true/false text
• Null → self-closing tags

Complex Types:

• Objects → nested XML elements
• Arrays → repeated child elements
• Nested objects → hierarchical XML

XML Features

Well-formed XML:

• Proper opening/closing tags
• XML declaration (optional)
• Character escaping (&, <, >, ", ')
• Valid tag names
• Proper nesting

Array Handling:

• Automatic singularization (users → user)
• Repeated elements for each item
• Maintains array order

Best Practices

1. Validate JSON First

Before conversion:

• Ensure JSON is valid
• Check for syntax errors
• Use JSON validator if unsure
• Test with small sample first

Tools for validation:

• Browser console: JSON.parse()
• Online JSON validators
• IDE JSON linting
• This tool shows errors

2. Choose Appropriate Root Element

Good root names:

<users>...</users> (for user data) <products>...</products> (for product catalog) <config>...</config> (for configuration) <response>...</response> (for API responses)

Avoid:

<root>...</root> (too generic) <data>...</data> (not descriptive) <xml>...</xml> (confusing)

3. Handle Special Characters

The converter automatically escapes:

• & → &
• < → <

• → >

• " → "
• ' → '

No manual escaping needed.

4. Consider Your Target System

For SOAP services:

• Check required root element
• Verify namespace requirements
• Match expected structure
• Test with actual service

For configuration files:

• Use meaningful element names
• Match schema if available
• Test with target application

5. Test the Output

After conversion:

1. Validate XML syntax
2. Test with target system
3. Verify all data converted
4. Check special characters handled
5. Confirm structure matches expectations

Technical Details

How JSON to XML Conversion Works

1. Parse JSON string into JavaScript object 2. Validate JSON syntax 3. Traverse object recursively 4. Convert each property to XML element 5. Handle arrays by creating repeated elements 6. Escape special XML characters 7. Apply indentation formatting 8. Add XML declaration if requested 9. Output well-formed XML string

Conversion Rules

JSON Type	XML Output
Object property	XML element
String value	Text content
Number value	Text content
Boolean value	"true" or "false"
Null value	Self-closing tag
Array	Repeated child elements
Nested object	Nested XML elements

Array to XML Mapping

JSON arrays become repeated elements:

JSON:

{"items": ["a", "b", "c"]}

XML:

<items> <item>a</item> <item>item>b</item> <item>c</item> </items>

Singularization rules:

• "users" → "user"
• "products" → "product"
• "items" → "item"
• No singular form → "item"

Limitations

This is a basic converter:

• No attribute support (all data becomes elements)
• No namespace handling
• No schema generation
• Simple singularization (just removes trailing "s")
• No CDATA sections

For advanced XML generation:

• xml2js: Full-featured Node.js library
• fast-xml-parser: High performance parser
• xmlbuilder2: XML builder with validation

This tool is best for:

• Simple JSON to XML conversion
• Quick one-off transformations
• Learning format differences
• API response conversion
• Privacy-focused use (100% local)

Browser Compatibility

Supported browsers:

• ✅ Chrome 90+
• ✅ Firefox 88+
• ✅ Safari 14+
• ✅ Edge 90+
• ✅ Opera 76+

Works on:

• Desktop: Windows, macOS, Linux
• Mobile: iOS Safari, Chrome Android
• Tablets: iPad, Android tablets

Privacy & Security

Client-Side Processing

• 100% Local: All conversion in your browser
• No Uploads: JSON never sent to server
• No Storage: Nothing saved or cached
• No Tracking: No analytics on your data
• No Accounts: No login required

Safe for Sensitive Data

• ✅ API credentials in config files
• ✅ Customer data
• ✅ Financial information
• ✅ Proprietary business data
• ✅ Personal information

Note: Remove sensitive credentials before sharing XML output with others.

Comparison with Other Tools

JSON to XML Converter vs xml2js

This Tool:

• ✅ Browser-based, instant
• ✅ No installation needed
• ✅ Privacy-focused (100% local)
• ✅ Simple interface
• ❌ Basic conversion only
• ❌ No attributes support

xml2js / fast-xml-parser:

• ✅ Full XML features
• ✅ Attribute support
• ✅ Schema validation
• ✅ Highly customizable
• ❌ Requires Node.js
• ❌ Coding knowledge needed

When to use this tool: Quick conversions, simple JSON, privacy

When to use libraries: Production apps, complex XML, automation

Integration Tips

Using Converted XML

1. Copy to Application:

• Convert your JSON
• Click "Copy XML"
• Paste into your application
• Test with target system

2. Download File:

• Convert your JSON
• Click "Download .xml"
• Save to your project
• Import into target system

3. API Integration:

// Convert JSON to XML const jsonData = { user: { name: "John" } }; // Use this tool to convert // Send XML to SOAP service

Automation Alternative

For repeated conversions:

// Node.js with fast-xml-parser const { j2xParser } = require("fast-xml-parser"); const parser = new j2xParser(); const xml = parser.parse(jsonData);

SOAP Integration Example

Converting REST to SOAP:

1. Fetch JSON from REST API
2. Convert to XML using this tool
3. Wrap in SOAP envelope
4. Send to SOAP web service
5. Parse SOAP response

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Note: For production use with complex XML requirements, namespaces, or attributes, consider using dedicated libraries like xml2js (JavaScript) or lxml (Python). This tool is perfect for simple conversions, quick transformations, and privacy-focused use cases.