JSON to YAML Converter
Convert JSON to YAML with configurable indentation and optional key sorting for stable config output. Perfect for frontmatter, infrastructure files, app settings, and developer documentation.
What is JSON to YAML Converter?
The JSON to YAML Converter transforms JSON text into YAML format. It parses the JSON, then serializes it as YAML with proper indentation, block scalars, and data type representation. The output is valid YAML that can be used in configuration files, Docker Compose, Kubernetes manifests, and CI/CD pipelines. All processing happens in the browser.
How does JSON to YAML Converter work?
This tool uses a JSON parser to validate the input, then converts the resulting JavaScript object to YAML by recursively processing each value type. Objects become YAML mappings, arrays become YAML sequences, strings are quoted when necessary, and numbers and booleans are represented as bare values.
Key Features
- Converts JSON to valid YAML
- Handles nested objects and arrays
- Proper string quoting and escaping
- Clean 2-space indentation
- Copy YAML to clipboard
- Download as .yml file
- Real-time conversion
- Maps JSON types to YAML scalars, sequences, and mappings
Common Use Cases
Converting API responses to YAML config
Transform a JSON API response into YAML for use in a configuration file.
Creating Docker Compose files
Convert JSON service definitions to YAML format for Docker Compose.
Migrating JSON configs to YAML
Convert existing JSON configuration files to the more readable YAML format.
Preparing Kubernetes manifests
Convert JSON resource definitions to YAML for use with kubectl.
How to Use This Tool
Paste JSON
Enter JSON text in the input area.
Convert
Click Convert. The tool parses the JSON and outputs YAML.
Copy or download
Copy the YAML to clipboard or download it as a .yml file.
Pro Tips
- 1
YAML is more readable than JSON for configuration files.
- 2
The tool quotes strings that contain special YAML characters.
- 3
Numbers and booleans are represented as bare values in YAML.
- 4
Download as .yml for direct use in Docker, Kubernetes, or CI/CD tools.
Frequently Asked Questions
Is the output valid YAML?
Yes. JSON to YAML converter produces valid YAML with proper indentation, string quoting, and data type representation.
How are JSON null values represented?
JSON null values are represented as empty values in YAML, which is the standard YAML representation for null.
Is my JSON uploaded to a server?
No. All conversion happens in your browser using JavaScript. The data never leaves your device.
Can I convert large JSON files?
Yes. The tool handles JSON of any size that fits in browser memory.
Does it handle nested structures?
Yes. The converter recursively processes nested objects and arrays with proper YAML indentation at each level.