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

Example:

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

After the quick-fix is applied:

data object Foo

Locating this inspection

By ID

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

ConvertObjectToDataObject

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

Suppressing Inspection

You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:

//noinspection ConvertObjectToDataObject

More detailed instructions as well as other ways and options that you have can be found in the product documentation:

IntelliJ IDEA 2025.2

Inspection Details
By default bundled with:	IntelliJ IDEA 2025.2, Qodana for JVM 2025.2,

Last modified: 18 September 2025