YAML to JSON Converter

How to convert YAML to JSON online – step-by-step guide

Use this online YAML to JSON converter to transform configuration files, Kubernetes manifests, or CI/CD configs into JSON format for APIs and tooling.

1. Step 1 – Paste or upload YAML

   • Paste YAML content into the left editor, or upload a .yaml or .yml file.
   • Works with Kubernetes configs, Docker Compose files, GitHub Actions workflows, and general YAML data.
   • Multi-document YAML (separated by ---) is converted to a JSON array.

2. Step 2 – Review the conversion

   • The JSON output appears on the right, preserving nested structures and data types.
   • YAML comments are removed (JSON doesn't support comments).
   • Check that arrays, objects, and scalar values are correctly converted.

3. Step 3 – Handle edge cases

   • YAML anchors and aliases may need manual adjustment in complex files.
   • Boolean values (true/false, yes/no) are normalized to JSON booleans.
   • Numbers and strings are preserved with proper JSON formatting.

4. Step 4 – Copy or download JSON

   • Use Copy to send the JSON to your clipboard for immediate use.
   • Or Download to save as a .json file.
   • Use the JSON in REST APIs, frontend applications, or any tool that requires JSON input.

# YAML input
apiVersion: v1
kind: ConfigMap
metadata:
  name: app-config
data:
  database_url: postgres://localhost/db
  debug: true
  ports:
    - 8080
    - 8081

// JSON output
{
  "apiVersion": "v1",
  "kind": "ConfigMap",
  "metadata": {
    "name": "app-config"
  },
  "data": {
    "database_url": "postgres://localhost/db",
    "debug": true,
    "ports": [8080, 8081]
  }
}

Related YAML & JSON tools

Convert between formats and work with configuration files using these complementary tools.