JObfuscator - Java Source Code Obfuscator

JObfuscator is a Java source code obfuscator. Obfuscate your Java source code & algorithms to protect it against reverse engineering analysis, LLMs, cracking and decompilation.

 JObfuscator has been updated with major changes

• Online interface - https://www.pelock.com/jobfuscator/
• Desktop & CLI - https://www.pelock.com/products/jobfuscator/download
• SDK packages - https://www.pelock.com/products/jobfuscator/api

Desktop app window

Engine history

v1.30 - 14.05.2026

• A new obfuscation strategy. Encrypt all double values using floating point math functions from the java.lang.Math.* class.
• A new obfuscation strategy. Rebuild string literals as runtime-created String objects from hidden char arrays.
• A new obfuscation strategy. Represent selected integer values through equivalent double math expressions.
• A new obfuscation strategy. Inject opaque mixer chains and unreachable guards to increase the amount of code decompilers have to analyze.
• A new obfuscation strategy. Replace plain true and false literals with equivalent runtime expressions.
• A new obfuscation strategy. Wrap selected safe statements in noisy try/finally blocks while preserving program behavior.
• A new obfuscation strategy. Encrypt int array contents and decode them at runtime.
• A new obfuscation strategy. Encrypt double arrays by hiding their values as encoded bit patterns.
• A new obfuscation strategy. Encrypt char arrays and restore the original characters through generated decoder code.
• A new obfuscation strategy. Encrypt String array elements and rebuild them while the program runs.
• A new obfuscation strategy. Split eligible string literals into nested .concat(...) chains so decompilers face more tokens and local data-flow steps; it runs before polymorphic string encryption when both are enabled.
• Updated the StringEncrypt engine with support for nested polymorphic loops in string encryption.
• Updated the engine parser configuration to support Java 21 source code constructs.

Client history

v1.3 - 14.05.2026

• Windows and Linux clients updated with all the new obfuscation strategies
• Windows client runs the obfuscation process in background now
• Drag & drop support added for faster Java file opening
• Command line version supports wildcards now and can process many files at once
• All the SDK packages updated