JSON to YAML Converter

JSON (JavaScript Object Notation) and YAML (YAML Ain't Markup Language) are two of the most widely used data serialization formats in software development. JSON is the standard for API communication and web data interchange, while YAML is popular for configuration files (Docker, Kubernetes, GitHub Actions, CI/CD pipelines) due to its human-readable, whitespace-based syntax.

Our free online JSON to YAML converter lets you instantly convert between these two formats. Convert JSON to YAML for cleaner, more readable configuration files, or convert YAML back to JSON for API payloads, data processing, or compatibility with systems that require JSON format. The tool handles nested objects, arrays, strings, numbers, booleans, and null values.

The converter uses the js-yaml library, a robust and widely-used YAML parser and serializer for JavaScript. It fully supports the YAML 1.2 specification, handling complex data structures, multi-line strings, anchors, aliases, and more. All processing happens in your browser — no data is sent to any server, making it safe for working with sensitive configuration data.

1. Select the conversion mode — Choose "JSON to YAML" or "YAML to JSON" depending on your input format.
2. Enter your input — Paste your JSON or YAML content in the input area.
3. Click Convert — Press the Convert button to transform your data between formats.
4. Copy the result — Click Copy Output to copy the converted content to your clipboard.
5. Use Swap — Click Swap to reverse the conversion direction, using the output as the new input.