YAML Formatter
Format and validate YAML files or convert between YAML and JSON. Free YAML formatter with syntax validation and error detection.
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What is YAML Formatter?
YAML Formatter beautifies YAML configuration files with proper indentation and validates syntax. YAML is used for Docker, Kubernetes, CI/CD configs, and many other applications. Consistent formatting prevents parsing errors and improves readability.
Key Benefits
- Syntax validation
- Consistent indentation
- Error highlighting
- YAML to JSON conversion
Common Use Cases
- •Docker configurations
- •Kubernetes manifests
- •CI/CD pipelines
- •Application settings
How to Format and Validate YAML
- Paste your YAML: Enter your YAML configuration into the input area.
- Check for errors: The tool automatically validates syntax and highlights any errors.
- Format the output: Click Format to apply consistent indentation (2 or 4 spaces).
- Copy or convert: Copy the formatted YAML or convert to JSON if needed.
Key Features
- Format and beautify YAML
- Syntax validation
- Configurable indentation
- Sort keys option
- Error highlighting
- Copy or download formatted YAML
Frequently Asked Questions
What is YAML used for?
YAML (YAML Ain't Markup Language) is a human-readable data format used for configuration files (Docker, Kubernetes, CI/CD), data exchange, and settings. It's simpler than JSON or XML for configuration.
Why is YAML indentation important?
YAML uses indentation to define structure instead of brackets. Inconsistent indentation causes parsing errors. Always use spaces (not tabs) and consistent indentation levels (typically 2 spaces).
Can I convert YAML to JSON?
Yes, this tool can convert between YAML and JSON formats. YAML and JSON are largely interchangeable for data, though YAML supports features like comments that JSON doesn't.
How do I validate my YAML file?
Paste your YAML into the input field. The formatter validates syntax and highlights any errors with line numbers. Common errors include incorrect indentation and invalid characters.