How to use this tool
- Paste JSON or YAML into the input field.
- Choose conversion direction and click Convert.
- Copy the result or clear to start over.
About JSON YAML Converter
This utility helps you switch between JSON and YAML for config files, API payloads, and CI definitions. Round-trip conversion may differ for edge cases like custom YAML tags or key ordering.
Common use cases
- Converting Kubernetes or Docker Compose configs between formats
- Translating API request bodies from JSON to YAML for tooling
- Migrating config files between systems that prefer different formats
FAQ
- What does this tool do?
- It converts JSON to YAML and YAML to JSON. You paste input, pick a direction, and get formatted output with validation errors if the input is malformed.
- Is my data sent to a server?
- No. All conversion runs locally in your browser. Your input is never transmitted or stored by this tool.
- Does round-trip conversion always produce identical output?
- Not always. YAML supports features like anchors and custom tags that JSON does not. Key order and formatting may differ after a round-trip.
- Why does my YAML show an error?
- Check indentation (YAML uses spaces, not tabs), colons in unquoted strings, and that lists and mappings are correctly structured. The error message points to the issue.