How This Tool Converts YAML to JSON
- YAML key-value pairs become JSON object properties — each
key: valueline maps directly to"key": valuein the JSON output. - YAML sequences (lines prefixed with
-) become JSON arrays. Each list item becomes one array element, preserving order. - YAML strings, integers, floats, booleans (
true/false), andnullare converted to their equivalent JSON types — the conversion is type-safe and lossless for standard YAML. - YAML anchors (
&name) and aliases (*name) are resolved during parsing. The output JSON contains the fully expanded values; anchor references are not preserved in the output. - Indented YAML blocks become nested JSON objects, with each indentation level corresponding to one level of nesting in the JSON output.
When to Use YAML to JSON
- When an API, database, or tool only accepts JSON payloads but your source config is a YAML file (Kubernetes manifest, Docker Compose, Ansible playbook).
- When you want to inspect or query Kubernetes or Helm values with a JSON-aware tool like JSONPath Tester or
jq. - When a CI/CD pipeline outputs YAML and you need to extract specific values programmatically using a JSON parser.
- When migrating infrastructure-as-code from YAML-based tooling to a JSON-accepting pipeline or configuration system.
Frequently Asked Questions
Can I convert Kubernetes YAML to JSON?
Yes. Paste any Kubernetes manifest, Helm values file, or Docker Compose YAML and the tool converts it to JSON, preserving all nested objects, arrays, and data types.
Does YAML to JSON preserve data types?
Yes. YAML strings → JSON strings, integers and floats → JSON numbers, true/false → JSON booleans, null → JSON null. The conversion is type-safe.
Is my YAML data sent to a server?
No. All conversion happens entirely in your browser. Your data never leaves your device.
What happens to YAML anchors and aliases?
Anchors (&name) and aliases (*name) are resolved during parsing. The output JSON contains the fully expanded values — the anchor references themselves are not preserved. If a value is referenced via three aliases, it will appear as three copies in the JSON output.
Does this tool handle multi-document YAML?
This tool converts a single YAML document at a time. Multi-document YAML files that use --- as a separator should be split into individual documents before converting each one separately.