JSON to Kotlin Data Class Generator

Generate Kotlin data classes with SerializedName annotations from JSON.

JSON Input

Kotlin Data Class Output

import com.google.gson.annotations.SerializedName

data class Root(
    @SerializedName("user_name")
    val userName: String,
    @SerializedName("age")
    val age: Int,
    @SerializedName("email")
    val email: String?,
    @SerializedName("scores")
    val scores: List<Int>,
    @SerializedName("address")
    val address: Address
)

data class Address(
    @SerializedName("city")
    val city: String,
    @SerializedName("zip_code")
    val zipCode: String
)

Kotlin data classes are the idiomatic way to represent JSON data in Android development and backend Kotlin services. They automatically provide equals(), hashCode(), and copy() methods. The @SerializedName annotation from Gson maps JSON keys to Kotlin property names, and nullable types use the ? suffix.

Frequently Asked Questions

: It generates Kotlin data classes with @SerializedName annotations for Gson, or @Json for Moshi compatibility.

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