JSON to YAML / YAML to JSON Converter

Free online JSON to YAML and YAML to JSON Converter. Transform configuration files between JSON and YAML formats with custom indentation and 100% browser privacy.

JSON to YAML / YAML to JSON Converter

Bi-directional client-side data serialization

Presets:

Indent:

JSON Input

39 lines • 655 chars

Converted YAML

22 lines • 375 chars

apiVersion: apps/v1
kind: Deployment
metadata:
  name: web-frontend
  labels:
    app: frontend
    tier: ui
spec:
  replicas: 3
  selector:
    matchLabels:
      app: frontend
  template:
    metadata:
      labels:
        app: frontend
    spec:
      containers:
        - name: nginx
          image: "nginx:1.25-alpine"
          ports:
            - containerPort: 80

Developer Scenario: Converting a Kubernetes Deployment Manifest from JSON to YAML

A DevOps engineer receives a Kubernetes container configuration as JSON from an automated API and needs clean, readable YAML for a GitOps repository.

Input JSON	{ "apiVersion": "apps/v1", "kind": "Deployment", "metadata": { "name": "web-service" }, "spec": { "replicas": 3, "selector": { "matchLabels": { "app": "web" } } } }
Converted YAML	apiVersion: apps/v1 kind: Deployment metadata: name: web-service spec: replicas: 3 selector: matchLabels: app: web

💡 The resulting YAML is formatted with standard 2-space indentation and ready for kubectl apply or Helm charts.

How to use JSON to YAML / YAML to JSON Converter

1
Paste your JSON or YAML data into the input editor, or choose from popular configuration presets (Docker Compose, Kubernetes Pod, CI/CD workflow).
2
Select the conversion direction: "JSON to YAML" or "YAML to JSON" using the mode switcher or the Swap button.
3
Adjust indentation size (2 spaces or 4 spaces) and review the converted output instantly in real time.
4
Click Copy Output or Download (.yaml / .json) to save the converted file to your machine.

Why use this tool?

Seamless Bi-Directional Conversion

Switch effortlessly between JSON to YAML and YAML to JSON with a single click, keeping data structures completely intact.

Handles Complex Data Types

Supports multi-line strings, boolean flags, numbers, null values, nested objects, and arrays without losing formatting or data fidelity.

Zero Latency & 100% Privacy

All parsing and serialization happen directly inside your web browser. Proprietary configurations and credentials never touch a remote server.

Frequently asked questions

Can I convert Kubernetes or Docker Compose YAML files to JSON?

Yes. You can paste any valid YAML document (including Kubernetes specs, Docker Compose files, and GitHub Actions workflows) to immediately convert it to structured JSON.

Does this tool support comments in YAML?

When converting YAML to JSON, YAML comments are parsed according to standard JSON spec (which does not support comments). When converting JSON to YAML, clean human-readable YAML is generated.

Is my data transmitted across any network?

No. UsefulGo processes all YAML and JSON conversion locally within your browser sandbox. No configurations or secrets are logged or sent to external servers.

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JSON to YAML / YAML to JSON Converter