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Convert 'object' to 'data object'

Reports object that can be converted to data object

data object auto-generates toString, equals and hashCode

The inspection suggests to convert object to data object in 2 cases:

  • When custom toString returns name of the class

  • When object inherits sealed class/interface


object Foo { override fun toString(): String = "Foo" }

After the quick-fix is applied:

data object Foo

Locating this inspection


Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | Kotlin | Probable bugs

This inspection only reports if the Kotlin language level of the project or module is 1.9 or higher


By default bundled with

IntelliJ IDEA 2024.1, Qodana for JVM 2024.1,

Can be installed with plugin

Kotlin, 241.18072-IJ

Last modified: 18 June 2024