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YAML to JSON Converter

Paste YAML data and instantly convert it to valid JSON with syntax highlighting and error checking.

Options

✓ Valid YAML

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YAML to JSON Converter

Convert YAML configuration files to JSON format instantly. Perfect for DevOps engineers, backend developers, and anyone working with configuration management systems.

Why Convert YAML to JSON?

  • Many APIs and systems require JSON format
  • Easier integration with JavaScript/Node.js applications
  • Better compatibility with web services
  • Simplified data processing and validation
  • Standardized format for data exchange

Common Use Cases

  • Converting Kubernetes manifests to JSON
  • Transforming Docker Compose files
  • Processing CI/CD pipeline configurations
  • Converting Ansible playbooks
  • Migrating configuration files between systems

Features

  • Real-time YAML validation
  • Instant conversion to JSON
  • Customizable indentation (2 spaces, 4 spaces, or tabs)
  • JSON minification support
  • Copy to clipboard functionality
  • Download as JSON file
  • Drag and drop file support
  • Error detection with line numbers

How to Use

  1. Paste your YAML content in the input area
  2. Or drag and drop a YAML/YML file
  3. Choose your preferred indentation style
  4. View the converted JSON instantly
  5. Copy or download the result

Example Conversion

YAML Input:

server:
  host: localhost
  port: 8080
database:
  name: mydb
  user: admin

JSON Output:

{
  "server": {
    "host": "localhost",
    "port": 8080
  },
  "database": {
    "name": "mydb",
    "user": "admin"
  }
}

Tips & Best Practices

  • Ensure proper YAML indentation (spaces, not tabs)
  • Use consistent key naming conventions
  • Validate YAML syntax before conversion
  • Test converted JSON with your application
  • Use minified JSON for production APIs

Frequently Asked Questions

How does YAML map to JSON?

Key: value pairs become JSON object properties, indented blocks become nested objects, and lines starting with - become array items. Numbers, true/false and null are converted to their JSON types; everything else becomes a string.

Why does my YAML fail to convert?

The most common causes are tabs used for indentation (YAML requires spaces), inconsistent indentation within one block, and a missing space after a colon. The converter points to the line where parsing stopped.

Which YAML features are supported?

Mappings, nested objects, lists, comments and plain scalar values, which covers typical config files such as Docker Compose, GitHub Actions and Kubernetes manifests. Advanced features such as anchors and aliases (&, *), multi-document files (---) and block text (| and >) are not supported.

What is the difference between YAML and JSON?

They describe the same kinds of data. YAML relies on indentation and allows comments, which makes it easier to write by hand; JSON uses braces and quotes and has no comments, which makes it stricter and easier for programs to parse. JSON is valid YAML 1.2.

Can I minify or download the JSON?

Yes. Choose 2-space, 4-space or tab indentation, or minify the output to a single line, then copy it or download it as a .json file.

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