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XML to YAML Converter

Convert XML documents to YAML format with support for attributes, nested elements, and flexible formatting options. Perfect for configuration file migration and data transformation.

Category: data
Use Case: Config Migration, API Transformation, Data Export
Privacy: 100% browser-based

Conversion Options

Merge attributes directly into parent (recommended)

Remove root wrapper for cleaner output

Alphabetical key ordering

Add --- at the start

Inline [1, 2, 3] format vs list style

Align array items with parent key

0 characters

Recommended Settings

XML to YAML Conversion Best Practices

  • Enable 'Flatten Attributes' for cleaner YAML that merges attributes with elements
  • Use 'Unwrap Root' when root element is just a wrapper with no meaningful data
  • Enable 'Sort Keys' for predictable output and better version control diffs
  • Use block style arrays (default) for readability, flow style for compact output
  • Set line width to 80 for terminals, 120 for modern editors, unlimited for no wrapping

Common Use Cases

  • Config migration: Convert XML configs to YAML for Kubernetes, Docker, Ansible, CI/CD
  • API transformation: Transform XML API responses to YAML for modern tooling
  • Data migration: Convert XML exports to YAML for easier parsing and editing
  • Documentation: YAML is more readable in Git diffs and code reviews
  • Testing: Generate YAML test fixtures from XML data sources

Pro Tips

  • Paste XML and it auto-validates - conversion triggers when valid XML detected
  • Green checkmark indicates well-formed XML ready for conversion
  • Attributes become regular keys (flattened) or separate attributes object
  • Repeated elements automatically become YAML arrays

Most Popular

Most users enable flatten attributes and unwrap root with 2-space indentation

When to Use This Tool

Configuration File Conversion

Convert XML configuration files to YAML for modern tools and frameworks. Transform Maven pom.xml, Spring beans.xml, or .NET config files to YAML format for tools like Kubernetes, Docker Compose, Ansible, or CI/CD pipelines that prefer YAML. Perfect for modernizing legacy XML configs to cleaner, more readable YAML format.

Recommended: DevOps & Migration

API Response Transformation

Transform XML API responses (SOAP, REST) to YAML for easier consumption and processing. Convert XML payloads to YAML for configuration management, documentation generation, or integration with YAML-based tools. Ideal for building API proxies, creating test fixtures, or normalizing data formats across microservices.

Recommended: API Integration

Data Migration & ETL

Migrate data from XML databases, exports, or backup files to YAML format for modern data pipelines. Convert XML data dumps to YAML for easier parsing, editing, and version control in Git repositories. Essential for data warehouse loading, cross-platform synchronization, or migrating from XML-based systems to YAML-native tools.

Recommended: Data Engineering

Documentation & Version Control

Convert XML documents to YAML for better readability in documentation and version control systems. YAML's clean syntax makes diffs more readable in Git, allows easier code reviews, and provides better human readability for configuration files, data definitions, and structured content stored in repositories.

Recommended: Documentation

How It Works

1

Paste or type your XML document into the input field

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Tool automatically validates XML using browser's DOMParser API

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Green checkmark appears when XML validation passes successfully

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Click 'Convert to YAML' to start conversion (or auto-converts on paste if valid)

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xml-js library parses XML structure into JavaScript object representation

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Transformation logic handles attributes (flatten or separate), text content, nested elements

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Unwraps root element if enabled and root has only one child element

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Repeated XML elements are detected and converted to YAML arrays automatically

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js-yaml library generates YAML with selected formatting options (indent, line width, flow style)

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Applies key sorting alphabetically if enabled for predictable output

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Adds document separator (---) at the start if configured

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Copy YAML to clipboard or download as .yaml file ready to use

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All processing happens in browser - your data never leaves your device

100% Private

Files never leave your device. All processing happens locally in your browser.

Lightning Fast

Powered by Client-side JavaScript with xml-js and js-yaml libraries for optimal performance on modern browsers.

Open Source

Built with verified, open-source libraries. Fully transparent.

Frequently Asked Questions

How are XML attributes converted to YAML?

With 'Flatten Attributes' enabled (default), attributes are merged directly into the parent element as regular key-value pairs. For example, <user id="123"><name>John</name></user> becomes {id: 123, name: John}. When disabled, attributes are preserved in a separate 'attributes' object to maintain the distinction between attributes and child elements.

What does 'Unwrap Root' do?

The 'Unwrap Root' option removes the root XML element if it's just a wrapper with a single child. For example, <root><database>...</database></root> becomes database: {...} instead of root: {database: {...}}. This is useful when the root element has no meaningful data and you want cleaner YAML output.

How are repeated XML elements handled?

Multiple elements with the same name at the same level are automatically converted to YAML arrays. For example, multiple <item> elements become a YAML list: items: [{...}, {...}]. This preserves the repetition pattern from XML in natural YAML array syntax, maintaining the data structure accurately.

What's the difference between flow and block style arrays?

Block style (default) shows arrays as indented lists with dashes (- item1). Flow style shows arrays inline like JSON ([item1, item2, item3]). Block style is more readable for complex nested structures and is the standard YAML format. Flow style is more compact but harder to read for large arrays.

How is XML text content represented in YAML?

Simple elements with only text (like <name>John</name>) become direct YAML values: name: John. Elements with both text and attributes get the text stored in a 'value' key: {id: 123, value: John}. Mixed content (text plus child elements) uses a 'text' key to avoid conflicts with element names.

Should I sort keys alphabetically?

Sorting keys alphabetically makes YAML more predictable and easier to compare in version control diffs. However, it changes the original element order from the XML. Enable sorting for configuration files where order doesn't matter, but disable it when element order is semantically important (like ordered lists or sequences).

What line width should I use?

Line width controls how long strings are before wrapping. 80 characters is standard for narrow terminal displays and code editors. 120 characters works well for modern wide screens. Unlimited (-1) keeps all values on single lines regardless of length. Use 80 for maximum compatibility, 120 for modern development environments.

Is my XML data sent to a server?

No. All conversion happens entirely in your browser using JavaScript. Your XML data never leaves your machine, ensuring complete privacy and security. The tool uses xml-js library to parse XML and js-yaml to generate YAML, all running locally without any server communication or data upload.