YAML Formatter

Format YAML configuration files with proper indentation and structure.

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Formatting Features:

  • Consistent indentation throughout
  • Preserves comments and structure
  • Handles nested objects and arrays
  • Key-value pair alignment
  • Configurable spacing options

How to Format YAML Online

  1. 1. Paste your YAML content in the input field
  2. 2. Choose your preferred indentation size
  3. 3. Click \"Format YAML\" to apply formatting
  4. 4. Copy the formatted output to use in your files
  5. 5. Load sample YAML to see proper formatting

Key Features

  • Consistent indentation for nested structures
  • Preserves comments and comments placement
  • Handles arrays and object nesting
  • Configurable indentation levels (2 or 4 spaces)
  • Works with Kubernetes, Docker, and other YAML configs

Frequently Asked Questions

How do I format YAML files online for free?

Paste your YAML code, select indentation (2 or 4 spaces), and click "Format". The tool automatically applies proper spacing, aligns keys and values, and creates clean, consistent indentation throughout your YAML file. Copy or download the formatted result.

Can I format Docker Compose YAML files with this tool?

Absolutely! The formatter works perfectly with Docker Compose files. It fixes indentation, aligns service definitions, properly formats environment variables, volumes, and networks. Makes docker-compose.yml files readable and easier to maintain.

What indentation should I use for YAML files?

Use 2 spaces per indentation level (YAML standard). Never use tabs. The formatter automatically applies consistent 2-space indentation, which is the standard for Kubernetes, Docker Compose, Ansible, and most YAML tools.

Can this format Kubernetes YAML manifests?

Yes! The formatter handles Kubernetes deployment, service, config map, and other manifest files. It properly indents metadata, spec, containers, and all Kubernetes-specific fields, making manifests clean and readable.

Does this work with Ansible YAML playbooks?

Yes, the formatter works great for Ansible playbooks, roles, and vars files. It properly formats tasks, handlers, variables, and conditionals with consistent indentation, making playbooks easier to read and debug.

Will formatting change my configuration values?

No, formatting only adjusts whitespace and indentation. All configuration values, keys, data types, and comments remain unchanged. The formatted YAML functions identically to the original - it's just more readable.

About YAML Formatter

YAML (YAML Ain't Markup Language) is a human-friendly data format commonly used for configuration files. Proper indentation and formatting is critical for YAML to be valid and readable.

  • • Essential for DevOps and infrastructure-as-code
  • • Works with Docker Compose, Kubernetes, Terraform
  • • Improves readability and maintainability
  • • Prevents indentation-related errors
  • • 100% private - no data leaves your browser