Free JSON ↔ YAML Converter
Effortlessly convert between JSON and YAML formats
Transform data between JSON and YAML with our free bidirectional converter. Ideal for configuration management, DevOps workflows, and data serialization tasks. All processing happens securely in your browser with zero server uploads.
📝 JSON vs YAML Explained
JSON uses brackets and braces with a compact syntax, while YAML relies on indentation and whitespace for a more human-readable format. YAML is popular in configuration files (Docker, Kubernetes, CI/CD), whereas JSON dominates web APIs and JavaScript ecosystems.
✨ Powerful Features
Instant Transformation
Convert between formats in real-time
Bidirectional Support
JSON to YAML and YAML to JSON
Secure Processing
No data sent to servers
Syntax Validation
Detects and reports format errors
Pretty Formatting
Clean, readable output with proper indentation
Always Free
No limits or registration
🎯 Common Usage Scenarios
⚙️ Configuration Management
Convert application configs between YAML (Docker Compose, Kubernetes) and JSON formats
🚀 DevOps Pipelines
Transform CI/CD pipeline definitions between YAML and JSON for different platforms
📦 Package Management
Convert package.json to YAML or vice versa for different build tools
🔧 Infrastructure as Code
Adapt CloudFormation, Terraform, or Ansible configurations between formats
📝 Documentation
Generate human-friendly YAML docs from JSON API responses
🧪 Testing & Validation
Verify data consistency across different serialization formats
📚 How It Works
- 1. Pick Format: Select JSON to YAML or YAML to JSON conversion
- 2. Input Data: Paste your JSON or YAML content into the input field
- 3. Transform: Hit the convert button to process your data
- 4. Verify Result: Check the formatted output for accuracy
- 5. Export: Copy the converted data to your clipboard
💡 Example Conversions
Basic Object:
JSON: {"port": 8080} → YAML: port: 8080
Nested Configuration:
JSON: {"server": {"host": "localhost"}} → YAML with indented structure
Array Conversion:
JSON arrays become YAML lists with dash notation
Reverse Process:
YAML: name: App → JSON: {"name": "App"}
❓ Frequently Asked Questions
Which format is better for configuration files?
YAML is generally preferred for human-edited config files due to its readability and minimal syntax. JSON works better for machine-generated configs and when strict parsing is required.
Does the converter handle comments?
YAML supports comments (# symbol), but JSON does not. When converting YAML with comments to JSON, comments are stripped. Converting back won't restore them.
Are multiline strings supported?
Yes! YAML multiline strings (using | or >) are converted to JSON strings with escaped newlines, preserving the content.
What about data types?
The converter preserves strings, numbers, booleans, arrays, and objects. YAML's implicit typing is maintained during conversion.
Is my configuration data private?
Yes! All conversions are performed locally in your browser using the js-yaml library. Your sensitive config data never leaves your device.