JSON ↔ YAML Converter
Convert between JSON and YAML instantly. Real-time output with error highlighting — everything runs in your browser.
Output will appear here…Frequently Asked Questions
What is YAML?
YAML (YAML Ain't Markup Language) is a human-readable data serialization format commonly used for configuration files. It uses indentation to represent nested structures and avoids the verbose punctuation of JSON, making it easier to read and write by hand.
What is the difference between JSON and YAML?
JSON uses braces, brackets, and quotes to delimit data, making it strict and machine-friendly. YAML uses indentation and minimal punctuation, making it more human-readable. YAML is a superset of JSON — any valid JSON is also valid YAML. YAML also supports comments (with #), which JSON does not.
When should I use YAML instead of JSON?
Prefer YAML for configuration files (Docker Compose, Kubernetes, GitHub Actions, Ansible) where humans frequently read and edit the file. Prefer JSON for API responses, data exchange between services, and situations where strict parsing and wide tool support matter most.
Is my data private?
Yes. All conversion happens entirely in your browser using JavaScript. No data is sent to any server, logged, or stored anywhere. You can safely paste sensitive configuration values.