JSON to Kotlin Data Class Converter: Generate Type-Safe Classes

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Convert JSON to Kotlin data classes with support for serialization annotations, nullable types, and nested structures. Perfect for Android development and API integration.

✓ Serialization Support✓ Nullable Types✓ Nested Classes

JSON

Kotlin

Generation Features

Code Features

  • •

    Serialization Support

    @Serializable and @SerialName annotations

  • •

    Type Safety

    Optional nullable types with proper Kotlin syntax

  • •

    Smart Type Inference

    Automatic detection of numbers, strings, and booleans

Customization

  • •

    Package Structure

    Custom package names and class organization

  • •

    Property Options

    Choose between val/var and nullable properties

  • •

    Formatting Control

    Property sorting and custom naming options

Common Use Cases

API Integration

  • • Response models
  • • Request payloads
  • • DTO generation
  • • API contracts

Android Dev

  • • Data models
  • • UI states
  • • Room entities
  • • View models

Backend Dev

  • • Domain models
  • • Entity classes
  • • Config objects
  • • Data transfer

Frequently Asked Questions

How are nested objects handled?

Nested objects are automatically converted into separate data classes with appropriate naming. The tool maintains the relationship between classes and generates proper references.

When should I use nullable types?

Enable nullable types when working with API responses where fields might be missing or null. This ensures type-safety while handling optional data in your Kotlin code.

What about serialization?

The @Serializable annotation enables kotlinx.serialization support for JSON parsing. Use @SerialName when you need to map JSON keys that don't match Kotlin property naming conventions.

How are arrays handled?

JSON arrays are converted to Kotlin List types. For arrays of objects, the tool creates a separate data class for the object type and uses List<YourClass> as the property type.

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