JSON ↔ YAML コンバーター
ブラウザで即座にJSONをYAMLに、またはYAMLをJSONに変換します。
What Is JSON to YAML Converter?
JSON to YAML Converter is a free online tool that converts JSON data to YAML format and vice versa. JSON and YAML are both widely used data serialization formats — JSON is common in APIs and web applications, while YAML is preferred for configuration files like Kubernetes manifests, Docker Compose, and CI/CD pipelines. This converter lets you switch between the two formats instantly without any manual reformatting.
How to Use JSON ↔ YAML Converter
- Select the conversion direction: JSON → YAML or YAML → JSON.
- Paste your input into the left panel.
- The converted output appears instantly in the right panel.
- Click Copy to copy the result, or ⇄ Swap to reverse the conversion.
Features
- Bidirectional conversion: JSON → YAML and YAML → JSON
- Real-time conversion as you type
- Swap input and output with one click
- Clear error messages for invalid input
- Copy result to clipboard
- Runs entirely in your browser — zero data uploaded
FAQ
Can I convert YAML back to JSON?
Yes. Switch to YAML → JSON mode and paste your YAML. The tool converts it to formatted JSON instantly.
Does the converter support multi-document YAML?
The converter handles single YAML documents. For multi-document YAML (separated by ---), only the first document is converted.
Is my data sent to a server?
No. All conversion happens entirely in your browser using the js-yaml library. Your data never leaves your device.