YAML Formatter & Validator
Validate and format YAML locally in your browser. Nothing is uploaded.
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About YAML Formatter & Validator
YAML Formatter & Validator validates YAML syntax, formats nested indentation, and converts YAML documents into clean structured data.
How to use YAML Formatter & Validator
- Paste your YAML document into the editor.
- Set formatting parameters such as indentation width.
- Click Format YAML to validate syntax and clean indentation.
- Inspect syntax error highlights or copy the formatted YAML result.
Examples
Input: name: test details: count: 10 Formatted: Valid YAML formatted with 2-space indentation.
FAQ
Does this tool detect invalid YAML tab characters?
Yes. The validator flags literal tab characters used for indentation as syntax errors.
Can YAML documents contain multiple document separators (---)?
Yes. Multi-document YAML streams separated by triple dashes are validated cleanly.