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📘 YAML Formatter
Format YAML, convert between YAML and JSON, and validate syntax instantly in your browser with offline support.
YAML Formatter & Converter
Format YAML, convert YAML ↔ JSON, and validate your data instantly in your browser. Powered by js-yaml and works fully offline.
How to use this tool
- Paste YAML or JSON into the input panel.
- Choose to format the YAML, convert to JSON, or convert JSON back to YAML.
- Copy or download the output once it looks correct and the stats check out.
Use cases
- Clean up infrastructure as code snippets before committing them.
- Convert API responses to YAML for documentation or configuration.
- Validate indentation before applying Kubernetes manifests.
Troubleshooting
- If you see a parse error, look for tabs or mixed indentation in the input.
- Large files may take a moment to process—wait for stats to update before retrying.
- Use the Reset button to reload the default YAML when experimenting.
FAQ
- Does it support YAML anchors and aliases?
- Yes. js-yaml handles anchors, aliases, and most YAML 1.2 features.
- How is file size calculated?
- The stats show byte sizes before and after formatting so you can gauge changes in payload weight.
- Can I control indentation width?
- Not yet. Output uses js-yaml's default 2-space indentation.
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