Java Transpiler

Open-source Java projects categorized as Transpiler

Top 7 Java Transpiler Projects

  • jsweet

    A Java to JavaScript transpiler.

    Project mention: Ask HN: Anyone Interested in Taking over | | 2023-12-10

    You can take a look at, which contains some Java libs transpiled by JSweet to TS/JS. The AWT/Swing implementation is just a proof of concept, but some other libs are fully functional like awt/geom.

    However, you have to be aware that the initial purpose of JSweet was not to port all Java libs to JS. JSweet allows the transpiler to be customized (with extensions) to map Java APIs to JS ones so that you don't necessarily need a JS runtime. It's all explained in the "Extending the transpiler" section of the core doc:

  • j2cl

    Java to Closure JavaScript transpiler

    Project mention: CheerpJ 3.0: a JVM replacement in HTML5 and WASM to run Java on modern browsers | | 2023-05-09
  • Onboard AI

    Learn any GitHub repo in 59 seconds. Onboard AI learns any GitHub repo in minutes and lets you chat with it to locate functionality, understand different parts, and generate new code. Use it for free at

  • Bytecoder

    Framework to interpret and transpile JVM bytecode to JavaScript, OpenCL or WebAssembly.

    Project mention: CheerpJ 3.0: a JVM replacement in HTML5 and WASM to run Java on modern browsers | | 2023-05-09
  • webfx

    A JavaFX application transpiler. Write your Web Application in JavaFX and WebFX will transpile it in pure JS.

    Project mention: I like to discuss ui frameworks for java backend? | /r/java | 2023-06-25

    There's this: But it uses GWT which is not maintained (actively) anymore.

  • bck2brwsr

    Bck2Brwsr VM to transpile Java bytecode to JavaScript

    Project mention: is there a way to create a java library with JS/TS bindings that can be published to npmjs ? | /r/java | 2023-07-05
  • clearwing-vm

    A Java to C++ transpiler project

    Project mention: Clearwing VM: A Java to C++ transpiler | /r/opensource | 2023-01-21
  • PyJava

    Use braces and semicolons in Python!

  • InfluxDB

    Collect and Analyze Billions of Data Points in Real Time. Manage all types of time series data in a single, purpose-built database. Run at any scale in any environment in the cloud, on-premises, or at the edge.

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020). The latest post mention was on 2023-12-10.

Java Transpiler related posts


What are some of the best open-source Transpiler projects in Java? This list will help you:

Project Stars
1 jsweet 1,406
2 j2cl 1,122
3 Bytecoder 826
4 webfx 260
5 bck2brwsr 112
6 clearwing-vm 33
7 PyJava 24
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