JSON to Kotlin
NewGenerate Kotlin data classes with Gson annotations from JSON data.
convertkotlindata-class
Read the guideShortcuts:⌘ KSearch?HelpD MDark modeG TAll tools
Properties are normalized to camelCase.
@SerializedName is added only when required.
Frequently Asked Questions
Why did my JSON keys become camelCase properties?
Property names are normalized to camelCase for Kotlin. If that changes the original key, the tool adds @SerializedName so Gson can still bind the JSON correctly.
How are nulls represented?
If the sample contains null for a field, the generated type becomes nullable and the constructor parameter gets = null.
What types does it choose for numbers and arrays?
Integers become Long, decimals become Double, and empty arrays fall back to List<Any>.
Will it inspect every object in an array?
It merges schemas across array items, but a key missing from one object does not become optional automatically. Only sampled nulls make a property nullable.
What happens for top-level primitives or arrays?
Those become a typealias instead of a data class. Object roots become data classes.