YAML to JSON Converter

Convert YAML configuration files into formatted JSON objects online.

  • 100% free
  • Private in browser
  • No signup
  • No watermarks
Drop a .yaml / .yml file here, or paste belowTap to choose a file
Indent:

JSON Output

28 lines
{
  "apiVersion": "apps/v1",
  "kind": "Deployment",
  "metadata": {
    "name": "web-server",
    "labels": {
      "app": "backend"
    }
  },
  "spec": {
    "replicas": 3,
    "template": {
      "spec": {
        "containers": [
          {
            "name": "app",
            "image": "node:20-alpine",
            "ports": [
              {
                "containerPort": 3000
              }
            ]
          }
        ]
      }
    }
  }
}

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About YAML to JSON Converter

Convert YAML documents, Kubernetes manifests, Docker compose files, or configuration specs into standard formatted JSON instantly in your browser. YAML to JSON on TheToolss provides instant validation, formats outputs with 2 or 4 spaces, and detects syntax issues on the fly. Free, private, and client-side.

How to use YAML to JSON Converter

  1. Paste your YAML code or upload a .yaml / .yml file.
  2. Choose your preferred JSON indentation spacing (2 or 4 spaces).
  3. View the generated JSON structure with real-time error verification.
  4. Copy the JSON or download it as a .json file.

Key features

  • Fast in-browser YAML to JSON conversion
  • Preserves numbers, booleans, and null primitives
  • Custom JSON indentation (2/4 spaces)
  • Real-time syntax validation with line errors
  • 100% private — code never leaves your device

Frequently asked questions

Is YAML to JSON free?
Yes. Convert YAML to JSON without accounts or limits on TheToolss.
Can I upload .yaml and .yml files?
Yes. Drag and drop any YAML or text file directly into the editor.
Is my data secure?
Yes. Conversion runs entirely inside your browser. Nothing is uploaded to any server.
Is my data uploaded or stored?
For browser-side tools, calculations and file processing stay on your device. Nothing you type is stored on our servers for that path.
Does it work on mobile phones?
Yes. Open YAML to JSON Converter (yaml-to-json) in a mobile browser — the layout adapts and no app install is required.

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YAML to JSON Converter (yaml-to-json) | TheToolss