konsoletyper/teavm

Health v2 · maintenance only

Adoption not part of the score

3098 stars · 333 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

TeaVM is an ahead-of-time compiler that translates Java bytecode (from Java, Kotlin, or Scala) into JavaScript, WebAssembly, or C. It ships with Maven/Gradle plugins and its own Apache-licensed reimplementation of the Java class library for building fast browser-based web apps without a JavaScript toolchain.

Use cases

• compile java to javascript for the browser
• build web apps in java without npm and webpack
• compile kotlin or scala to webassembly
• reuse java backend code in the frontend
• aot compile jvm bytecode to c
• gwt alternative that works from class files

When to choose

• you are a JVM developer writing a web front-end from scratch
• you want to share Java backend logic with browser code
• you need small, fast JavaScript/Wasm output without a JS build stack
• your code avoids heavy reflection, class loaders, and JNI

When to avoid

• you want to port a large existing Java codebase to the browser unmodified
• your app relies heavily on reflection, resources, class loaders, or JNI
• you need to run Swing desktop apps in the browser (consider CheerpJ instead)
• you need stable embedding APIs for custom build tools

Facets

library · maturity active

compiler build-tool wasm compilers web-development programming-languages frontend jvm browser wasm cli aot-compilation java-to-javascript java-to-webassembly gwt-alternative kotlin scala maven-plugin gradle-plugin web-server

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markdown · JSON · MCP: product_card(name="konsoletyper/teavm")