JSON to YAML Converter Online — Convert JSON and YAML
Convert JSON to YAML or YAML to JSON online in your browser. Format structured configuration data locally without uploading it.
About this tool
This JSON and YAML converter detects JSON objects and arrays by their opening character. JSON input is parsed and emitted as YAML, while YAML input is parsed and returned as indented JSON for configuration and development workflows.
How to use
- Paste a JSON object, JSON array or YAML document into the input field.
- Run the converter; JSON input becomes YAML and YAML input becomes formatted JSON.
- Review data types and formatting, then copy the result into your configuration or source file.
Features
- Converts JSON objects and arrays to readable YAML.
- Converts YAML into consistently indented JSON.
- Processes configuration text locally in the browser.
Common use cases
- Move configuration between JSON-based and YAML-based tools.
- Prepare API data for a YAML configuration file.
- Inspect a YAML document as structured JSON.
Common issues and tips
- Tabs and inconsistent indentation can make YAML invalid.
- YAML supports values and features that may not have an exact JSON equivalent.
Privacy
JSON and YAML conversion runs locally in your browser. Configuration text is not uploaded to Tools12345.
Frequently asked questions
How does the tool choose the conversion direction?
Input beginning with an opening brace or bracket is treated as JSON; other input is parsed as YAML.
Will YAML comments be preserved?
No. Parsing converts the document into data, so comments and some original formatting are not retained.
Is JSON valid YAML?
JSON is compatible with the YAML data model, but this tool emits a more conventional readable YAML representation.