DataFormattools
JSON · Converter

JSON to YAML Converter

Convert JSON to YAML online in seconds. Convert nested JSON objects and arrays into clean YAML 1.2 syntax with accurate data type preservation.

Interactive Editor
JSON Input
0 lines · 0 B
1
Auto-executes on edit
YAML Output
0 lines · 0 B
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100% In-Browser Privacy: All conversions, formatting, and validations run purely on your machine using client-side JavaScript. Your data, code snippets, and environment variables are never transmitted to any server or recorded in logs.
Specifications

How JSON → YAML Works

  • Parses the input JSON string into a structured object.
  • Translates objects to YAML key-value pairs and arrays to bulleted sequences.
  • Preserves native types including strings, numbers, booleans, and nulls.
Demonstration

Example Input & Output

Maps JSON objects to indented YAML mappings and JSON arrays to YAML sequence lists, preserving booleans, numbers, and strings.

JSON Input
{
  "apiVersion": "apps/v1",
  "kind": "Deployment",
  "metadata": {
    "name": "web-service",
    "labels": {
      "app": "frontend"
    }
  },
  "spec": {
    "replicas": 3
  }
}
YAML Output
apiVersion: apps/v1
kind: Deployment
metadata:
  name: web-service
  labels:
    app: frontend
spec:
  replicas: 3
Applications

Common Use Cases

Kubernetes Manifests

Convert JSON service definitions into clean Kubernetes YAML configurations.

CI/CD Workflows

Transform JSON task definitions into GitHub Actions or GitLab CI YAML files.

Guidelines

Key Specifications & Gotchas

Special Characters in Strings

Ensure strings containing colons or symbols are properly quoted in YAML.

Questions

Frequently Asked Questions

How do I convert JSON to YAML?

Paste your JSON in the input box, and the tool will immediately generate clean YAML in the output pane.

Are boolean and null values preserved?

Yes, true, false, and null are mapped to standard YAML literals.

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