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YAML Formatter & Converter
Format YAML, convert between YAML and JSON, and validate syntax instantly in your browser with offline support.
How to use this tool
- Paste YAML or JSON into the input panel.
- Adjust formatting and multi-document controls as needed.
- Format or convert, then copy or download the output.
Use cases
- Standardize Kubernetes manifests with key sort and quote controls.
- Convert multi-document YAML bundles into JSON arrays for API tooling.
- Split JSON arrays into per-document YAML for config repositories.
Troubleshooting
- If parsing fails, check for tabs or mixed indentation.
- Disable multi-document mode when your input is guaranteed single-doc.
- If strings are being reformatted, adjust quote style and force-quote toggles.
FAQ
- Does it support YAML anchors and aliases?
- Yes. Parsing and serialization are handled by js-yaml, including anchors and aliases.
- Can I control indentation width and line length?
- Yes. Use the formatting controls to set indentation and preferred line width.
- How are multiple YAML documents handled?
- Enable parse-all mode to load all --- documents, then choose whether to emit separators on output.
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