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YAML ⇄ JSON Converter

Convert Kubernetes manifests, Compose files and CI configs between YAML and JSON, with clear error line numbers.

🔒 Runs locally — your input never leaves this browser tab

YAML

JSON

Indent

Convert on the command line

yq -o=json file.yaml              # YAML → JSON (mikefarah/yq)
yq -P file.json                   # JSON → YAML
kubectl get deploy web -o json    # ask kubectl for JSON directly

YAML gotchas that break deployments

The Norway problem: in YAML 1.1, unquoted NO, yes, on become booleans. Quote country codes and flags.
Tabs: YAML indentation must use spaces.
Octal-looking numbers: mode: 0755 may be parsed as 493. Quote file modes and version numbers like "1.10".
Multiple documents: --- separates documents; this converter handles one document at a time.