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JSON to Kotlin Data Class Converter — Free, Instant

Paste JSON to generate a matching Kotlin data class — correct property types inferred, and fields that could be absent marked nullable — ready to paste directly into an Android or backend Kotlin project instead of hand-writing the class.

How to use JSON to Kotlin

1. Paste your JSON.
2. Review the generated Kotlin data class.
3. Copy it into your project.

Frequently asked questions

Are nested JSON objects handled?

Yes — nested objects generate their own named data class referenced from the parent class.

Does it mark fields as nullable appropriately?

Fields explicitly present as null in your example are generated as nullable types; fields always present with a value are non-nullable by default.

Is this compatible with kotlinx.serialization or Gson?

The generated data class works with either — you may want to add the relevant @Serializable or @SerializedName annotations depending on which library your project uses.

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