Your API gives you JSON. Kubernetes wants YAML.
That’s basically the whole reason this tool exists. You’ve got a JSON object, maybe from an API response, maybe from a data source, maybe you just think in JSON, and you need it as YAML for your Docker Compose file, K8s manifest, GitHub Actions workflow, or Ansible playbook.
Paste the JSON, click convert, get clean YAML with 2-space indentation. Strings with special characters (colons, brackets, things that look like booleans) get auto-quoted so they won’t break your YAML parser.
Where this comes up
Kubernetes is the obvious one. You pull a resource definition from the API as JSON (kubectl get deployment my-app -o json) and need to put it in a YAML manifest. Copy-paste and reformat manually? Life’s too short.
Docker Compose: you’ve got your service configuration as a JSON object and need it in docker-compose.yml format.
CI/CD pipelines: GitHub Actions, GitLab CI, CircleCI all use YAML. If you’re generating pipeline configs programmatically, the source might be JSON.
Ansible: converting JSON data structures into YAML for playbooks and variable files.
JSON vs YAML: pick the right one
They represent the same data. JSON is stricter, better for machine-to-machine communication, and has a parser in every language ever made. YAML is easier for humans to read, supports comments (JSON doesn’t), and uses less visual clutter.
If humans edit the file regularly, use YAML. If machines generate and consume it, use JSON. If you need comments, YAML wins by default.
For the reverse direction, the YAML to JSON converter is also available.
FAQ
How are special strings handled?
Strings containing colons, brackets, quotes, or values that look like YAML types (true, null, numbers) get wrapped in double quotes automatically.
Deeply nested JSON?
Handled recursively at any depth. The output uses 2-space indentation at each level, the standard convention for K8s, Docker Compose, and GitHub Actions.
Any external libraries?
Nope, custom recursive converter, runs entirely in your browser with zero dependencies.
Client-side?
Yes, your JSON never leaves your browser. Safe for configs with secrets.