Last checked and updated on April 15, 2026What is new in Kotlin 2.4
Kotlin 2.4 brings several meaningful improvements that make everyday development safer and more enjoyable. The highlight is the introduction of name-based destructuring, which lets you unpack data classes using property names rather than their order. This release also stabilizes context parameters and additional annotation use-site target features, adds official Java 26 support, and includes new standard library functions for unsigned integers and sorted collections.
With more than 15 years of experience building large-scale applications with Kotlin, I see these updates as practical steps that reduce common mistakes and improve code readability without breaking existing projects.
Name-Based Destructuring
Name-based destructuring addresses a frequent frustration with traditional destructuring declarations. Instead of matching values by their position in the class, you can now bind variables directly by property name.
This approach makes your code clearer and more resilient to changes in data class structure, such as when properties are added or reordered.
data class User(val id: Int, val name: String, val email: String)
val user = User(1, "Alice", "[email protected]")
// Name-based destructuring
val (name, email) = user
println("Name: $name, Email: $email")The compiler matches the variable names to the corresponding properties, so the order inside the parentheses does not matter. This feature is currently experimental and helps prevent subtle bugs during refactoring.
Stabilized Language Features
| Feature | Status | Advantage |
|---|---|---|
| Context parameters | Stable | Pass implicit values cleanly without cluttering function signatures |
| Annotation use-site targets | More options stable | Finer control over annotation placement in generated code |
Platform and Standard Library Updates
Kotlin 2.4 adds support for Java 26 on the JVM. Annotations in metadata are now enabled by default, improving compatibility with Java tools and libraries.
The standard library gains new APIs for converting unsigned integers to BigInteger and convenient ways to check if collections or arrays are already sorted. These small additions help reduce boilerplate in numerical and data processing code.
On the multiplatform side, Kotlin/Native improves support for using Swift packages as dependencies, which simplifies projects targeting Apple platforms.
Compiler and Tooling Enhancements
The compiler receives performance and consistency improvements, including better handling of inline functions across modules and more reliable collection literal support. These changes help large projects compile faster and behave more predictably.
Other tooling updates focus on better IDE integration, Wasm debugging, and fixes for edge cases reported by the community.
Frequently Asked Questions about Kotlin 2.4
What makes name-based destructuring different from the classic version?
Classic destructuring relies on the order of properties. Name-based destructuring matches by property names, so you no longer need to worry about the sequence or skipping values with underscores.
Is name-based destructuring safe to use in production code?
It is marked experimental in this release. You can test it today, but keep in mind that the final syntax or behavior may receive small adjustments based on community feedback before the stable release.
Which developers will benefit most from Kotlin 2.4?
Teams working with data classes, multiplatform projects, or Java interoperability will notice the biggest improvements. The stabilized context parameters also help clean up code that passes common dependencies.
Should I start using Kotlin 2.4 now?
Try the beta in side projects or experimental branches first. It is an excellent opportunity to explore name-based destructuring and provide feedback to the Kotlin team.
Summary of Kotlin 2.4
Kotlin 2.4 focuses on making code more readable and less error-prone. Name-based destructuring stands out as a thoughtful addition that solves a real daily pain point. Together with stabilized features, better Java support, and standard library enhancements, this version continues to evolve the language in a practical direction while maintaining strong backward compatibility.
These changes help both new and experienced developers write cleaner, more maintainable Kotlin code across JVM, multiplatform, and native targets.