Kotlin 2.2.20 Released: Key Changes Explained
Original post Kotlin 2.2.20 Released
Article Summary
Sarah Haggarty announces Kotlin 2.2.20, and the web development story just got a major upgrade. Kotlin/Wasm has officially hit Beta status.
JetBrains released Kotlin 2.2.20 with significant improvements across multiplatform development, web capabilities, and native performance. This release focuses heavily on making Kotlin a stronger contender for web development while enhancing the developer experience across all platforms.
Key Takeaways
- Kotlin/Wasm reaches Beta with improved JavaScript interop and browser debugging
- Swift export now available by default for multiplatform projects
- Long values now compile to JavaScript BigInt instead of custom objects
- Stack canaries added to Native binaries with smaller release sizes
- New shared source set supports both js and wasmJs targets
Kotlin 2.2.20 positions the language as a serious web development platform while strengthening its multiplatform capabilities and native performance.
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Sep 1, 2026
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This page summarizes “Kotlin 2.2.20 Released” by Kotlin Blog, published Sep 10, 2025. All credit for the original work goes to the authors.
