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YAML and JSON are two of the most common formats for configuration files and data interchange — YAML favored for readability, JSON favored for strict, unambiguous structure and universal parser support.
This converter switches between the two formats instantly, in either direction.
How it works
Choose a direction (YAML to JSON or JSON to YAML), paste your data, and the converter parses it and re-serializes it in the target format, flagging any syntax errors it finds along the way.
- Enter convert.
- Enter input.
- Click Calculate to see your results.
Examples
Converting a config file
A YAML snippet like "name: Alice\nage: 30" converts to the JSON object {"name": "Alice", "age": 30}.
Converting JSON to YAML
A JSON API response can be converted to YAML to make it easier to read or paste into a YAML-based configuration file.
Who should use it
- Converting a YAML configuration file (like a Docker Compose or CI pipeline file) to JSON for a tool that only accepts JSON.
- Converting a JSON API response into a more readable YAML format for documentation or manual editing.
Industry applications
- Software development and DevOps
- API documentation and configuration management
Advantages
- Converts in both directions from one tool.
- Clearly reports syntax errors instead of silently producing bad output.
Limitations
- Comments in YAML input are not preserved when converting to JSON.
Common mistakes to avoid
- Using tabs for indentation in YAML, which is invalid — YAML requires spaces for indentation.
- Forgetting that JSON requires double quotes around all string keys and values, unlike YAML which often doesn't need them.
Best practices
- When converting JSON to YAML for a configuration file, review the output for lines that might benefit from an explanatory comment, since JSON can't carry that context over.
Tips
- YAML is indentation-sensitive — if a conversion fails, check for mixed tabs and spaces or misaligned list items first.