YAML Formatter & Validator — Format YAML Files Online

Format & Validate YAML

Clean up YAML syntax, fix indentation issues, and validate structure.

How to Use

Open the YAML Formatter tool

Paste your YAML

See properly indented output

Errors are highlighted for invalid YAML

Common Uses

• Kubernetes manifests — validate before applying
• Docker Compose — check docker-compose.yml syntax
• CI/CD configs — GitHub Actions, GitLab CI
• Application configs — Spring Boot, Rails, etc.

FAQ

Why is YAML indentation important?

YAML uses indentation for structure (unlike JSON's braces). Wrong indentation = wrong data.

Can I convert between YAML and JSON?

Yes — use YAML to JSON or JSON to YAML.