data_object YAML to JSON Converter

key: value
nested:
  child: value
  another: 123

# This is a comment

items:
  - item1
  - item2
  - item3

# Inline: [a, b, c]

string: Hello World
number: 42
float: 3.14
boolean: true
null_value: null
date: 2024-01-15

# Literal block (keeps newlines)
text: |
  Line 1
  Line 2

# Folded block (joins lines)
desc: >
  This is a long
  description

# Define anchor
defaults: &defaults
  adapter: postgres
  host: localhost

# Use alias
development:
  <<: *defaults
  database: dev_db

null: null  # or ~
true: true  # or yes, on
false: false # or no, off

# Quoted string (force type)
not_null: "null"
not_bool: "true"

YAML to JSON Converter - Free Online Tool

Convert between YAML (YAML Ain't Markup Language) and JSON (JavaScript Object Notation) with our free online converter. Perfect for developers working with configuration files, APIs, and data serialization.

Features

• Bidirectional conversion - Convert YAML to JSON and JSON to YAML with a single tool
• Syntax validation - Real-time validation with helpful error messages
• Customizable output - Control indentation, quoting style, and array formatting
• Multi-document support - Handle YAML files with multiple documents (--- separator)
• Comment preservation info - Understand how comments are handled during conversion
• File upload - Import YAML or JSON files directly
• Client-side processing - Your data never leaves your browser

What is YAML?

YAML is a human-readable data serialization format commonly used for configuration files and data exchange. Key features include:

• Human-readable - Clean, minimal syntax without brackets or quotes (in most cases)
• Indentation-based - Structure defined by whitespace, similar to Python
• Support for comments - Add documentation with # comments
• Multiple data types - Strings, numbers, booleans, null, dates, arrays, objects
• Anchors & aliases - Reuse data with &anchor and *alias syntax

What is JSON?

JSON (JavaScript Object Notation) is a lightweight data interchange format. It's the de facto standard for:

• Web APIs and RESTful services
• Configuration files (package.json, tsconfig.json)
• NoSQL databases (MongoDB, CouchDB)
• Data storage and transmission

YAML vs JSON Comparison

Feature	YAML	JSON
Readability	More readable (minimal syntax)	More verbose (brackets, quotes)
Comments	✓ Supported (#)	✗ Not supported
Multi-line strings	✓ Native support (| and >)	✗ Must use \n escapes
Data references	✓ Anchors & aliases	✗ Not supported
Parsing speed	Slower	Faster (native in browsers)
Common uses	Config files (Docker, K8s, CI/CD)	APIs, databases, web apps

When to Convert YAML to JSON

• API requests - Most APIs expect JSON payloads
• JavaScript/TypeScript - JSON is native to JavaScript
• Validation - JSON Schema tools often require JSON input
• Debugging - Some tools only visualize JSON

When to Convert JSON to YAML

• Configuration files - YAML is preferred for Docker, Kubernetes, Ansible
• Documentation - YAML's readability makes configs self-documenting
• Adding comments - Convert to YAML to annotate your data
• CI/CD pipelines - GitHub Actions, GitLab CI, and others use YAML

Common YAML Files

• docker-compose.yml - Docker container orchestration
• .github/workflows/*.yml - GitHub Actions workflows
• kubernetes/*.yaml - Kubernetes manifests
• ansible/*.yml - Ansible playbooks and roles
• .gitlab-ci.yml - GitLab CI/CD pipelines
• openapi.yaml - OpenAPI/Swagger specifications

Privacy & Security

All conversions happen entirely in your browser using JavaScript. Your data is never uploaded to any server, making this tool safe for sensitive configuration files and credentials.