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YAML Formatter & Validator

Our free online YAML formatter helps you format, validate, and beautify your YAML code with advanced features like automatic format detection and smart suggestions. Perfect for working with Kubernetes manifests, Docker Compose files, AWS CloudFormation templates, and Azure Resource Manager (ARM) templates.

Features​

Automatic Format Detection​

The tool automatically detects the format of your YAML content, supporting:

  • Kubernetes manifests
  • Docker Compose files
  • AWS CloudFormation templates
  • Azure Resource Manager (ARM) templates
  • Generic YAML

Smart Validation​

Real-time validation with detailed feedback:

  • Syntax error detection with line numbers
  • Format-specific validation (e.g., required fields for Kubernetes manifests)
  • Style suggestions for better YAML practices
  • One-click fixes for common issues

Formatting Options​

  • Consistent indentation (2 spaces)
  • Proper line breaks
  • Sorted keys for better readability
  • Trailing whitespace removal
  • Tab to space conversion

Interactive Wizard​

  • Step-by-step guidance for creating YAML configurations
  • Format-specific templates and suggestions
  • Real-time validation and formatting
  • Helpful documentation and examples

Best Practices​

  1. Use Consistent Indentation: Always use 2 spaces for indentation.
  2. Avoid Tabs: Use spaces instead of tabs for better compatibility.
  3. Remove Trailing Whitespace: Keep your YAML clean and free of unnecessary whitespace.
  4. Include Required Fields: Always include format-specific required fields.
  5. Use Comments: Add comments to explain complex configurations.

Keyboard Shortcuts​

  • Format Document: Ctrl/Cmd + Shift + F
  • Save: Ctrl/Cmd + S
  • Undo: Ctrl/Cmd + Z
  • Redo: Ctrl/Cmd + Shift + Z

FAQ​

Q: Why is format detection important?​

A: Format detection helps ensure your YAML follows the correct schema and includes all required fields for specific platforms like Kubernetes or Docker Compose.

Q: How does the validator handle large files?​

A: The validator uses efficient parsing and debounced validation to handle large files smoothly without impacting performance.

Q: Can I use this tool offline?​

A: Currently, this is an online-only tool. Consider using our desktop app (coming soon) for offline usage.

Q: Does it support all YAML features?​

A: Yes, the tool supports all YAML 1.2 features, including anchors, aliases, and multi-document files.

Support​

Need help or have suggestions? Visit our GitHub repository or contact us.