Convert JSON to Kotlin data class definitions with auto-detected types, nullable support, and nested class generation
Developer Tools
About This Tool
The JSON to Kotlin Data Class converter generates Kotlin data class definitions from your JSON data. It supports nullable type declarations, nested data classes, customizable root class names, and real-time conversion — all running locally in your browser.
Key Features
- Kotlin data class generation with proper type mapping
- Nullable type handling with ? operator for null values
- Nested data class support for complex objects
- Customizable root class name
- Real-time conversion with instant preview
- One-click copy and sample data loading
Use Cases
- Generate Kotlin models for Android applications
- Create data classes for API response handling
- Automate Kotlin model creation from JSON schemas
- Quickly scaffold data classes for Retrofit or Ktor clients
- Convert mock JSON data into Kotlin data classes for prototyping
json
kotlin
data-class
android
model
Frequently Asked Questions
What is the JSON to Kotlin Data Class converter?
The JSON to Kotlin Data Class converter generates Kotlin data class definitions from your JSON data. It maps JSON types to Kotlin types, handles nested classes, and supports nullable type declarations.
Does it support nested objects?
Yes, the tool handles nested JSON objects by generating separate Kotlin data classes for each nested structure. It also properly handles lists and arrays of objects.
Can I enable nullable types?
Yes, you can toggle the Nullable option. When enabled, fields with null values will be declared with the Kotlin nullable type operator (?), making them optional in your data classes.
Is my data safe when using this tool?
Absolutely. All processing happens locally in your browser. No data is uploaded to any server, ensuring your information remains completely private and secure.
Can I customize the root class name?
Yes, you can specify a custom root class name using the Root name input field. The default name is 'Root', but you can change it to any valid Kotlin class name.