Learn KOTLIN-JS-WASM with Real Code Examples

Kotlin-based frontend SaaS apps

Wasm compute plugins

Enterprise internal tools

Full-stack Kotlin services

Cross-platform product SDKs

Full WASI 0.3 support

Native threading in Wasm

Improved React/KVision tooling

Smaller Wasm bundle size

Faster Wasm DOM integration

Ultra low-level Wasm needs (Rust/Zig better)

Projects needing tiny WASM binary sizes

Pure JS ecosystem-heavy apps

Realtime or GPU-bound workloads

Legacy browsers without Wasm-GC

Kotlin JS + Wasm brings modern Kotlin to browsers and JS platforms.

Wasm backend provides high performance and type safety.

Excellent for shared logic across web, mobile, and backend.

Strong ecosystem via JetBrains tooling.

Ideal for teams using Kotlin end-to-end.

Does Kotlin/Wasm support GC?

Yes - with Wasm-GC in modern browsers.

Can Kotlin/Wasm run in Node?

Partial, JS target is more stable.

Is Kotlin/JS production-ready?

Yes, widely used in real products.

Can I share code with Android/JVM?

Yes - core benefit of Kotlin Multiplatform.

Are Wasm binaries small?

Smaller than JS bundles, but larger than TinyGo/Rust.