YAML ⟷ JSON Converter

Instantly convert between YAML and JSON with real-time error detection. Runs 100% in your browser for absolute privacy.

Quick Scenarios & Presets:

YAML Input289 B

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

JSON Output541 B ✓ Valid Conversion

{
  "apiVersion": "apps/v1",
  "kind": "Deployment",
  "metadata": {
    "name": "web-app",
    "labels": {
      "app": "frontend"
    }
  },
  "spec": {
    "replicas": 3,
    "template": {
      "metadata": {
        "labels": {
          "app": "frontend"
        }
      },
      "spec": {
        "containers": [
          {
            "name": "web",
            "image": "nginx:alpine",
            "ports": [
              {
                "containerPort": 80
              }
            ]
          }
        ]
      }
    }
  }
}

Why Developers Choose DevsLoad YAML ⟷ JSON Converter

Streamlined, private, and precise data serialization in your web browser.

Bidirectional Instant Conversion

Switch seamlessly between YAML to JSON and JSON to YAML with a single click. Keep inputs and outputs perfectly synchronized.

Exact Error Pinpointing

Pinpoint syntax flaws instantly. Get exact line and column numbers with an interactive visual code snippet and caret pointer.

Zero Data Transmission

All parsing and serialization runs 100% locally in your browser. API credentials, secret tokens, and server configs never touch a network.

Multi-Document YAML Support

Easily handles complex YAML streams containing multiple documents delimited by triple-dashes (---), cleanly bundling them into JSON.

Indentation & Formatting Control

Choose between standard 2-space or 4-space indentation for clean, readable configuration files and code review diffs.

One-Click Export & Download

Quickly copy the converted result to your clipboard or download a clean .json or .yaml file ready for your project repository.

Step-by-Step: Converting Between YAML and JSON

Quick guide for developers, DevOps engineers, and system administrators.

1. Select Conversion Direction

Click the "YAML ➔ JSON" or "JSON ➔ YAML" tab, or use the "Swap Direction (⇄)" button to switch modes at any time.

2. Paste or Load Your Data

Paste your YAML or JSON code into the left editor, or choose one of our realistic cloud templates (Kubernetes, Docker, GitHub Actions).

3. Inspect Live Output & Validation

The converted payload appears in real time. If your input has a missing indent or bracket, our diagnostic engine highlights the exact line.

4. Copy or Download

Click "Copy" for instant clipboard access or "Download" to save your clean formatted .json or .yaml configuration file.

Frequently Asked Questions

Everything you need to know about YAML and JSON data serialization.

What is YAML and why would I convert it to JSON?

YAML (YAML Ain’t Markup Language) is a human-readable data serialization format predominantly used for configuration files (like Kubernetes, Docker Compose, and CI/CD workflows). JSON is standard for web APIs, databases, and JavaScript runtimes. Converting YAML to JSON lets developers feed configuration into automated scripts, web endpoints, and schema validators.

Are comments preserved when converting YAML to JSON?

The JSON standard (RFC 8259) does not officially support comments. Therefore, when converting YAML to JSON, YAML comments (# ...) are stripped so that the resulting JSON is strictly valid across all standard JSON parsers and APIs.

Is my data secure and private?

Yes, 100%. All parsing, schema analysis, and conversion runs entirely within your browser client using WebAssembly/JavaScript. No text, tokens, or configuration secrets are ever sent to any remote server or logged in telemetry.

Can this tool convert multi-document YAML files?

Yes! If your YAML contains multiple documents separated by triple-dash markers (---), our converter parses all documents and outputs them as a clean JSON array containing each document in order.

How does indentation work between YAML and JSON?

YAML relies on strict whitespace indentation (spaces only, never tabs). JSON uses braces {} and brackets [] for structure, making whitespace purely cosmetic. Our tool allows you to format output with either 2-space or 4-space indentation for optimal team readability.

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