Data

YAML Formatter & Validator

Catch common YAML indentation and structure errors, then normalize readable configuration locally in your browser.

Browser-local
Private workspaceInput is kept in this tab
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Run the tool to see a result.

Validation runs in the browser. Advanced YAML features should still be verified with the target platform.

About this tool

What YAML Validator does

YAML is indentation-sensitive. This fast preflight catches tabs, inconsistent indentation, missing mapping separators, and malformed collections before a configuration reaches CI.

Common uses

  • Check a small YAML snippet
  • Normalize indentation
  • Prepare YAML for conversion to JSON

Privacy and limitations

Validation runs in the browser. Advanced YAML features should still be verified with the target platform.

Always validate security-sensitive output in the authoritative application or platform.

Frequently asked questions

Does this validate Kubernetes schemas?

No. Use the Kubernetes Manifest Validator for apiVersion, kind, metadata, and platform checks.

Are anchors supported?

The quick browser parser focuses on common mappings and sequences. Anchors and custom tags need a full platform validator.