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YAML Validator

Validate, format, and convert YAML to JSON instantly in your browser.

Example Presets

YAML Input

How to Use the YAML Validator

Paste your YAML into the input field — validation runs automatically as you type.
A green badge means your YAML is valid; a red badge shows the exact error line and message.
Click Format YAML to normalize indentation and clean up spacing.
Click Convert to JSON to see your YAML as a formatted JSON object.