YAML ↔ JSON Converter
Convert YAML to JSON or JSON to YAML instantly. Choose pretty-print or minified output. Runs entirely in your browser — your data never leaves your device.
What is YAML?
YAML (YAML Ain't Markup Language) is a human-friendly data serialization format widely used for configuration files — think Docker Compose, Kubernetes manifests, GitHub Actions workflows, and Ansible playbooks. It uses indentation rather than brackets, making it easier to read than JSON for complex nested structures.
When to convert
APIs typically speak JSON, while config files lean YAML. You'll need to convert when: copying a Kubernetes manifest into an API call, moving data between a config file and a REST endpoint, or debugging a CI/CD pipeline by inspecting the parsed structure of a YAML workflow file.
Key differences
YAML supports comments (# prefixed lines), multiline strings, and anchors/aliases — none of which survive a round-trip to JSON. JSON is a strict subset of JavaScript object literal syntax and is universally supported in every language. When precision and interoperability matter, prefer JSON; when human readability matters, prefer YAML.
