YAML to JSON – Online Converter

Convert any YAML document to JSON with full fidelity. YAML is great for configuration, but JSON is often required for APIs, data exchange, and JavaScript applications. Our tool gives you instant, accurate conversion.

How YAML to JSON Conversion Works

YAML is a superset of JSON, so the conversion is straightforward but not trivial because YAML has features JSON lacks: comments, anchors, aliases, multi‑line strings, and custom tags. Our parser resolves all YAML specifics and outputs standard JSON.

Example Conversion

# Input YAML
version: '3.8'
services:
  web:
    image: nginx:latest
    ports:
      - "80:80"
    environment:
      - NODE_ENV=production

// Output JSON
{
  "version": "3.8",
  "services": {
    "web": {
      "image": "nginx:latest",
      "ports": ["80:80"],
      "environment": ["NODE_ENV=production"]
    }
  }
}

Handling Advanced YAML Features

• Anchors & aliases – fully expanded, no references remain
• Multi‑line strings – become JSON strings with escaped newlines
• Custom tags (!!str, !!int, !!float) – parsed according to YAML 1.2
• Comments – removed (JSON has no comment syntax)
• Multiple documents (---) – option to convert as array of JSON objects

Advanced Options

• Indentation – 2 spaces, 4 spaces, or compact (no spaces)
• Multiple documents – first only or all as array
• Key ordering – preserve YAML insertion order (default) or sort alphabetically
• Escape mode – standard JSON escaping or Unicode escape sequences

Use Cases

• Convert Kubernetes YAML to JSON for API consumption
• Transform Docker Compose files to JSON for programmatic editing
• Migrate Ansible playbooks to JSON‑based automation tools
• Prepare YAML configuration for JavaScript applications
• Debug YAML structures by viewing them as JSON

Our converter is based on a strict YAML 1.2 parser. It handles nested objects, arrays, and all scalar types. No registration, no watermarks – just paste or upload your YAML and get JSON instantly.