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Top 23 Java Compiler Projects
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Graal
GraalVM compiles Java applications into native executables that start instantly, scale fast, and use fewer compute resources 🚀
Project mention: Project Crema – Open World for Graal Native Image | news.ycombinator.com | 2025-06-10 -
InfluxDB
InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
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bytecode-viewer
A Java 8+ Jar & Android APK Reverse Engineering Suite (Decompiler, Editor, Debugger & More)
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Dynamic class loading, typically when using either Java Reflection or Groovy Scripting;
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OpenJ9
Eclipse OpenJ9: A Java Virtual Machine for OpenJDK that's optimized for small footprint, fast start-up, and high throughput. Builds on Eclipse OMR (https://github.com/eclipse/omr) and combines with the Extensions for OpenJDK for OpenJ9 repo.
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also https://github.com/mirkosertic/Bytecoder and https://github.com/i-net-software/JWebAssembly as well as the already mentioned (in some other comment) https://cheerpj.com/
most of them are still experimental, while CheerpJ offers Enterprise support (but it targets the browser).
oh, and let's not forget j2cl https://github.com/google/j2cl
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SaaSHub
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also https://github.com/mirkosertic/Bytecoder and https://github.com/i-net-software/JWebAssembly as well as the already mentioned (in some other comment) https://cheerpj.com/
most of them are still experimental, while CheerpJ offers Enterprise support (but it targets the browser).
oh, and let's not forget j2cl https://github.com/google/j2cl
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also https://github.com/mirkosertic/Bytecoder and https://github.com/i-net-software/JWebAssembly as well as the already mentioned (in some other comment) https://cheerpj.com/
most of them are still experimental, while CheerpJ offers Enterprise support (but it targets the browser).
oh, and let's not forget j2cl https://github.com/google/j2cl
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SquirrelJME
SquirrelJME is a Java ME 8 Virtual Machine for embedded and Internet of Things devices. It has the ultimate goal of being 99.9% compatible with the Java ME standard.
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swc4j
swc4j (SWC for Java) is an ultra-fast JavaScript and TypeScript compilation and bundling tool on JVM.
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jmurmel
A standalone or embeddable JVM based interpreter/ compiler for Murmel, a single-namespace Lisp dialect inspired by Common Lisp
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Project mention: TennessineC: A toy C compiler, written in pure Java | news.ycombinator.com | 2024-08-05
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sof-language
The Stack with Objects and Functions Programming Language, a pure stack-based reverse-polish-notation functional and object-oriented experimental programming language.
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imp
Imp is a statically typed and compiled scripting language with the goal of increasing programmer confidence.
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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).
Java Compiler discussion
Java Compiler related posts
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Project Crema – Open World for Graal Native Image
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Easy way to Install Nvm Macos
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Chicory: A JVM native WebAssembly runtime
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Why Does Everyone Forget Java and C# for Backend Development? Why Don’t Full-Stack Developers Learn Java and C#?
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Translating 10M lines of Java to Kotlin
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Introduction to the Bytecode DSL
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How to Build an Elm Land Project for Production
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A note from our sponsor - SaaSHub
www.saashub.com | 19 Jun 2025
Index
What are some of the best open-source Compiler projects in Java? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | Graal | 20,916 |
| 2 | bytecode-viewer | 15,067 |
| 3 | groovy | 5,322 |
| 4 | OpenJ9 | 3,412 |
| 5 | jsweet | 1,478 |
| 6 | j2cl | 1,308 |
| 7 | janino | 1,291 |
| 8 | JWebAssembly | 1,024 |
| 9 | Bytecoder | 926 |
| 10 | Cosmic-IDE | 579 |
| 11 | proguard-core | 315 |
| 12 | SquirrelJME | 272 |
| 13 | swc4j | 163 |
| 14 | claro-lang | 143 |
| 15 | qbicc | 136 |
| 16 | mindcode | 107 |
| 17 | jactl | 59 |
| 18 | fuzion | 54 |
| 19 | interpreter | 33 |
| 20 | jmurmel | 25 |
| 21 | TennessineC | 18 |
| 22 | sof-language | 11 |
| 23 | imp | 11 |
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