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Top 23 Java Bytecode Projects
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bytecode-viewer
A Java 8+ Jar & Android APK Reverse Engineering Suite (Decompiler, Editor, Debugger & More)
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if you want to an online java decompiler for a quick analysis, I recommend https://slicer.run/, it has a sleek UI and provides support for a variety of decompilers (including the likes of Vineflower, CFR, JASM, Procyon). For more in-depth analysis, https://github.com/Col-E/Recaf is probably my first choice
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find-sec-bugs
The SpotBugs plugin for security audits of Java web applications and Android applications. (Also work with Kotlin, Groovy and Scala projects)
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skidfuscator-java-obfuscator
Public production-ready obfuscator using the MapleIR framework designed by cts
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depclean
DepClean automatically detects and removes unused dependencies in Java Maven projects. Paper: https://dx.doi.org/10.1007/s10664-020-09914-8)
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Maker
Cojen/Maker is a lightweight, full-featured, low-level dynamic Java class generator designed for ease of use.
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Log4JShell-Bytecode-Detector
Local Bytecode Scanner for the Log4JShell Vulnerability (CVE-2021-44228)
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ecd
ECD++ - Fork of Enhanced Class Decompiler - integrate modern Java decompilers seamlessly into the development workflow
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Project mention: Show HN: JVM hot-path execution analysis for Java in the age of vibe coding | news.ycombinator.com | 2026-02-17
• Where would this save you the most time: learning a new codebase, validating AI-assisted changes, refactoring safely, or chasing weird behaviour?
Project: https://github.com/sfkamath/jvm-hotpath
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 Bytecode discussion
Java Bytecode related posts
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Ask HN: Is Java the ideal language for LLM-assisted coding?
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JavaFX In Action with Matt Coley, diving into byte code and JARs with Recaf and JavaFX libraries
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Show HN: FlowTracker – Track data flowing through Java programs
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When this will come to Java or when will the work start for this?
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Bytecoder: Interpret and Transpile JVM Bytecode to JavaScript, OpenCL or WASM
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Any news on the Classfile API?
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what is the easiest way to decompile, edit and recompile a mod?
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A note from our sponsor - SaaSHub
www.saashub.com | 8 Jun 2026
Index
What are some of the best open-source Bytecode projects in Java? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | bytecode-viewer | 15,524 |
| 2 | Recaf | 7,214 |
| 3 | JaCoCo | 4,568 |
| 4 | soot | 3,082 |
| 5 | find-sec-bugs | 2,426 |
| 6 | scouter | 2,173 |
| 7 | robovm | 1,029 |
| 8 | threadtear | 973 |
| 9 | Bytecoder | 940 |
| 10 | JByteMod-Beta | 862 |
| 11 | SootUp | 794 |
| 12 | skidfuscator-java-obfuscator | 765 |
| 13 | jasm | 472 |
| 14 | depclean | 360 |
| 15 | proguard-core | 335 |
| 16 | Caesium | 323 |
| 17 | JMapper Framework | 243 |
| 18 | bck2brwsr | 125 |
| 19 | JPL | 116 |
| 20 | Maker | 67 |
| 21 | Log4JShell-Bytecode-Detector | 48 |
| 22 | ecd | 13 |
| 23 | jvm-hotpath | 9 |
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