ai-agent

Bytecode Viewer

A Java 8+ Jar & Android APK Reverse Engineering Suite (Decompiler, Editor, Debugger & More)
15,595 stars1,271 forksJavaUpdated 7/17/2026100% free · open source
What it does

Bytecode-viewer is a Java 8+ and Android APK reverse engineering tool that allows users to decompile, edit, and debug Java bytecode and Android APK files.

When to use it
  • When you need to reverse engineer a Java application to understand its internal workings
  • When you want to debug and edit Java bytecode or Android APK files
  • When you need to analyze and understand the behavior of a Java or Android application
Ready-to-paste prompt
Load a Java class file called 'HelloWorld.class' into the viewer and decompile it using the 'Decompile' button, then edit the resulting source code and recompile it
Heads up: Make sure you have Java 8 or later installed on your system, as bytecode-viewer requires it to run
Saves to your device
Use with Claude
New

Skip the builder — one click puts this in Claude, Cursor, Antigravity and more.

🛠️ Technical setup

Expect 20–40 minutes in a terminal — or let your AI agent drive it.

Try it instantly — no install
Claude Code
mkdir -p ~/.claude/skills/bytecode-viewer && curl -fsSL https://workflowstacks.com/api/skills/bytecode-viewer/claude-skill -o ~/.claude/skills/bytecode-viewer/SKILL.md
Open in another AI app

Opens the app with this repo with the prompt ready to go — no copy-paste needed.

Connect the whole catalog (MCP)
claude mcp add --transport http workflowstacks https://workflowstacks.com/api/mcp

Adds a WorkflowStacks connector to Claude Code: search and load any skill here by chatting.

How Bytecode Viewer works
Codeflow
Free to inspect

Bytecode Viewer is a large Java project (~46k lines across 311 code files, plus 1 test files). It is a full software project: use it through its install path rather than reading it end to end. Last commit 2 months ago, GPL-3.0 license, has a test suite.

Size
Large codebase
~46k lines · 311 code files · ~6 h to skim
Setup
Developer setup
A real software project. Use it via its install path; don't expect to read it all.
Runs on
Java/JVM
No API keys detected
Java 98%HTML 1%Lex 1%
Where to start reading
  1. 1
    README.md
    Start here — what it does and how to install it
  2. 2
    src/main/resources/templates/Template_Plugin.java
    Inside src/ — the main logic begins here
What's in each folder
src/Core code — the actual logic400 files
plugins/Sub-packages / plugins11 files
libs/Folder21 files
install/Folder4 files
.github/CI / automation (GitHub Actions)1 files
READMEHas testsDocumentedCI checksGPL-3.0 licenseUpdated 2 mo ago
Quick Actions
Details
Creator
Konloch
Language
Java
Category
ai-agent
Published
10/14/2014

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