Is my YAML data secure?

Yes — all processing happens entirely in your browser using JavaScript. Your YAML is never sent to any server. We don't collect, store, log, or transmit your data in any form.

Can I validate Kubernetes YAML here?

Yes. This tool validates the YAML syntax of any Kubernetes manifest — Deployments, Services, ConfigMaps, Pods, Ingress, and more. It catches indentation errors, duplicate keys, and malformed structure.

Can I convert JSON to YAML?

Yes. Paste JSON into the editor and the tool auto-detects the format, switching the primary button to JSON → YAML. The conversion handles nested objects, arrays, strings, numbers, and booleans.

What YAML features are supported?

The formatter supports the full YAML 1.2 specification: anchors and aliases, multi-line strings, complex keys, multi-document files separated by ---, comments, and all standard data types.

Does this work offline?

Once the page is loaded, all features work without an internet connection. There are no API calls — everything runs client-side in your browser.

What indentation options are available?

You can choose 2 spaces (default), 4 spaces, or 8 spaces. 2 spaces is standard for Kubernetes and most DevOps tooling.

Back to YAML Formatter

JSON to YAML Converter

Convert JSON to YAML instantly — free, online, and 100% client-side. Handles nested objects, arrays, all data types, and complex JSON structures.

Convert JSON to YAML Now

Paste your JSON into the editor — the tool auto-detects JSON input and switches the button to JSON → YAML automatically. No signup, no upload, no server — everything runs in your browser.

Open the JSON to YAML Converter

How to Convert JSON to YAML

Paste your JSON

Copy your JSON content and paste it into the editor. The tool automatically detects JSON input and highlights the JSON to YAML conversion button.

Click JSON to YAML

Hit the JSON to YAML button. The converter parses your JSON and produces clean, human-readable YAML with correct indentation.

Copy or Download

Your YAML output appears with syntax highlighting. Copy to clipboard or download as a .yaml file.

JSON to YAML — Conversion Examples

Side-by-side examples showing how JSON structures map to their YAML equivalents.

Application Config

JSON Input

{
  "database": {
    "host": "localhost",
    "port": 5432,
    "name": "mydb",
    "ssl": true
  },
  "server": {
    "port": 3000,
    "debug": false
  },
  "features": [
    "auth",
    "analytics"
  ]
}

YAML Output

database:
  host: localhost
  port: 5432
  name: mydb
  ssl: true
server:
  port: 3000
  debug: false
features:
  - auth
  - analytics

Kubernetes Service (from JSON)

JSON Input

{
  "apiVersion": "v1",
  "kind": "Service",
  "metadata": {
    "name": "my-service",
    "labels": {
      "app": "my-app"
    }
  },
  "spec": {
    "ports": [
      {
        "port": 80,
        "targetPort": 8080
      }
    ]
  }
}

YAML Output

apiVersion: v1
kind: Service
metadata:
  name: my-service
  labels:
    app: my-app
spec:
  ports:
    - port: 80
      targetPort: 8080

Why Convert JSON to YAML?

JSON is the lingua franca of APIs and data exchange, but YAML is the preferred format for configuration files, infrastructure-as-code, and CI/CD pipelines. Converting JSON to YAML makes it more human-readable and easier to maintain.

Common scenarios where you need JSON to YAML conversion:

Kubernetes manifests: API responses and tooling output often come as JSON — convert to YAML to write clean Kubernetes config files.
GitHub Actions: Convert JSON config snippets to YAML format required by GitHub Actions workflow files.
Docker Compose: Transform JSON configuration exported from tools into docker-compose.yml format.
Helm charts: Helm values files are YAML — convert JSON configs from other tools to feed into Helm.
Readability: YAML removes braces, quotes, and commas — converting JSON to YAML makes complex nested configs significantly easier to read and edit.

What the Converter Handles

All JSON data types

Strings, numbers, booleans, null, objects, and arrays are all converted to their YAML equivalents with correct type handling.

Nested objects

Deeply nested JSON objects become indented YAML mappings. The nesting depth and structure are fully preserved.

Arrays and lists

JSON arrays become YAML sequences using dash notation. Both primitive arrays and arrays of objects are handled correctly.

Boolean and null values

JSON true/false become YAML true/false. JSON null becomes YAML null. Type semantics are preserved exactly.

Numeric types

Integer and floating-point numbers are preserved as-is. Large integers and numbers with decimal points are output correctly.

Complex nesting

Arrays of objects, objects containing arrays, and deeply nested combinations are all supported without data loss.

FAQ

Is this JSON to YAML converter free?

Yes — completely free with no usage limits, no login, and no account required.

Is my JSON data safe?

100%. All conversion happens in your browser using JavaScript. Your JSON is never sent to any server, never stored, and never logged. Once the page loads, it works entirely offline.

Can I convert minified JSON?

Yes. The converter accepts both minified (single-line) and pretty-printed JSON. The YAML output is always properly formatted and indented regardless of the input format.

What indentation does the YAML output use?

The YAML output uses 2-space indentation by default, which is the most common standard for Kubernetes and DevOps tooling. You can change it to 4 or 8 spaces using the indent selector in the main tool.

Does the converter handle JSON arrays at the root level?

Yes. If your JSON root is an array (e.g., [{...}, {...}]), the converter outputs a YAML sequence correctly.

What happens to JSON null values?

JSON null values are converted to YAML null, which is represented as an empty value or the literal word null depending on context.

Can I go back from YAML to JSON?

Yes — use the YAML to JSON button on the same tool to convert in the other direction. You can also visit the dedicated YAML to JSON converter page.