Paste your JSON on the left, get clean YAML output on the right. Real-time conversion, 100% in your browser.
YAML (YAML Ain't Markup Language) is a human-friendly data serialisation standard commonly used for configuration files — Kubernetes manifests, GitHub Actions, Docker Compose, Ansible playbooks. JSON (JavaScript Object Notation) is the de-facto format for APIs. This converter bridges the two instantly.
JSON requires braces, brackets, quotes and commas — it's machine-friendly and excellent for APIs. YAML uses indentation and colons — it's more readable for humans and config files. Both represent the same data structures (objects/maps, arrays/sequences, strings, numbers, booleans, null).
The tool parses your JSON using the browser's built-in JSON.parse(), then converts the resulting JavaScript object to YAML using a pure-JS serialiser. Strings with special characters are automatically quoted. Nested objects are indented with 2 spaces. Arrays use YAML's dash notation.