JSON to YAML Converter
Convert JSON data to YAML format and vice versa. Free online JSON to YAML converter.
Frequently Asked Questions
What is YAML?
YAML (YAML Ain't Markup Language) is a human-friendly data serialization format. It's commonly used for configuration files (Docker Compose, Kubernetes, CI/CD pipelines). YAML uses indentation for structure instead of braces and brackets, making it more readable than JSON.
How does the converter work?
For JSON โ YAML, the tool parses the JSON into a JavaScript object, then recursively converts it to YAML format using proper indentation and YAML syntax. For YAML โ JSON, the tool parses YAML (using a lightweight parser) and outputs formatted JSON.
What data types are supported?
The converter handles strings, numbers, booleans, null, arrays, and nested objects. Multi-line strings use the YAML block scalar syntax. Arrays are represented with dash notation (- item).
When should I use YAML vs JSON?
Use YAML for configuration files that humans will read and edit โ it supports comments and is more readable. Use JSON for data exchange between systems and APIs โ it's more compact and universally supported. YAML is a superset of JSON, so all JSON is valid YAML.
Is this tool free?
Yes, completely free with no sign-up required. All conversion happens in your browser.