Bytecode Viewer is an Advanced Lightweight Java Bytecode Viewer, GUI Procyon Java Decompiler, GUI CFR Java Decompiler, GUI FernFlower Java Decompiler, GUI Jar-Jar, Hex Viewer, Code Searcher, Debugger and more. It's written completely in Java, and it's open sourced. It's currently being maintained and developed by Konloch.
There is also a plugin system that will allow you to interact with the loaded classfiles, for example you can write a String deobfuscator, a malicious code searcher, or something else you can think of. You can either use one of the pre-written plugins, or write your own. It supports groovy, python and ruby scripting. Once a plugin is activated, it will execute the plugin with a ClassNode ArrayList of every single class loaded in BCV, this allows the user to handle it completely using ASM.
Code from various projects has been used, including but not limited to: J-RET by WaterWolf JHexPane by Sam Koivu RSynaxPane by Robert Futrell Commons IO by Apache ASM by OW2 FernFlower by Stiver Procyon by Mstrobel CFR by Lee Benfield CFIDE by Bibl
Key Features: Java Decompiler - It uses a modified version of FernFlower, Procyon and CFR. Bytecode Decompiler - A modified version of CFIDE's. Hex Viewer - Powered by JHexPane. Each Decompiler/Viewer is toggleable. Fully Featured Search System. A Plugin System With Built In Plugins. (Show All Strings, Malicious Code Scanner, String Decrypters, etc) Fully Featured Scripting System That Supports Groovy, Python And Ruby. Recent Files & Recent Plugins. EZ-Inject - Graphically insert hooks and debugging code, invoke main and start the program.
What is new in this release:
Version 2.8.1 fixed UI bug with Krakatau/Krakatau Editable view panes; added CTRL + F.