TTKTheTextKit
Format Conversion

YAML to JSON Converter

Convert YAML data structures into clean, validated, pretty-printed JSON live as you type. Easily inspect configuration files, Kubernetes manifests, GitHub Actions workflows, or Docker Compose files in standard JSON format with zero server uploads.

366 characters100% In-Browser Parsing
JSON Output
{
  "server": {
    "host": "0.0.0.0",
    "port": 8080,
    "ssl_enabled": true
  },
  "features": [
    {
      "name": "dark_mode",
      "enabled": true
    },
    {
      "name": "client_storage",
      "enabled": false
    }
  ],
  "database": {
    "connection": "postgresql://user:secret@localhost:5432/app",
    "pool_size": 10,
    "timeout_seconds": 30
  },
  "metadata": {
    "app": "TheTextKit",
    "version": "1.0.0",
    "maintainers": [
      "Alex",
      "Sam"
    ]
  }
}

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About the YAML to JSON Converter

YAML (YAML Ain't Markup Language) is a human-friendly data serialization standard commonly used for configuration files in modern DevOps (Kubernetes, Docker Compose, GitHub Actions, Ansible, OpenAPI/Swagger). JSON (JavaScript Object Notation), on the other hand, is the universal standard for web APIs, document databases, and application data exchange. Developers frequently need to translate between the two formats when feeding configuration manifests into REST APIs, writing automated validation scripts, or inspecting complex nested structures. This converter implements a robust parser supporting the core YAML specification: nested key-value mappings, sequence arrays (hyphenated lists), inline arrays and objects, booleans, numeric scalars, quoted strings, and comments. If invalid indentation or malformed syntax is detected, clear line-specific error indicators are displayed immediately. All parsing is executed client-side.

Which YAML features are supported in this converter?▾

The tool supports the common developer YAML subset: nested mappings (key: value), list sequences (- item), scalars (strings, integers, floats, booleans, null), inline arrays [1, 2], inline maps {a: 1}, and comments (#).

Why does indentation matter in YAML?▾

YAML uses Python-style whitespace indentation to denote nested data structures. Mixing tabs with spaces or having inconsistent indent levels causes parsing syntax errors.

Is my configuration data or secret token sent over the network?▾

No. All YAML parsing and JSON generation occur 100% locally in your browser. Your API keys, database credentials, and infrastructure definitions never leave your device.