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YAML Formatter — Free Online YAML Beautifier & Validator

Our YAML Formatter takes messy, poorly-indented YAML configuration files and reformats them with proper indentation and structure. Perfect for Docker Compose, Kubernetes manifests, GitHub Actions workflows, and Ansible playbooks.

Why Use YAML Formatter?

  • Fix indentation issues in YAML files with one click
  • Validate YAML syntax and catch indentation errors
  • Convert between YAML and JSON formats for flexibility
  • Syntax-highlighted output for readability
  • No server uploads — your configuration stays private

Features

  • Automatic indentation correction (2-space standard)
  • YAML syntax validation with error reporting
  • YAML to JSON conversion
  • JSON to YAML conversion
  • Copy formatted output to clipboard

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Frequently Asked Questions

What is the correct YAML indentation?

YAML uses spaces (2 spaces per level is standard). Tabs are not allowed. Our formatter automatically corrects indentation issues.

Can I convert YAML to JSON?

Yes. Our tool supports bidirectional conversion between YAML and JSON, letting you switch between formats as needed.

Is YAML hard to learn?

YAML is designed to be easy to read and write. Its main challenge is getting indentation right — our formatter handles that automatically.