Joker Obfuscator

The best Java & Minecraft bytecode protector you'll ever need

Browser Auto Builder

Drag and drop your JAR file below to obfuscate directly in your browser

Drop your JAR file here

or click to browse from your computer

Active protections: Fast Preset
Fast Preset Active (Pre-configured) Free builds run on the Fast preset. Individual feature customization, custom profiles, and decoy bots require Premium.
Build Console Output
Waiting for archive submission...
Drop a JAR on the left to begin browser obfuscation.

Build History

Access and re-download your past obfuscated JARs, symbol mappings, and reports

Loading build history...

Provenance & Leak Tracer

Drop any suspected leaked JAR to inspect embedded cryptographically bound buyer metadata

Drop JAR to Trace

or click to browse from your device

Decompiler Crasher Suite

Injects AST recursion loops, self-referential inner classes, and monitor invariants to instantly crash Vineflower, CFR, Procyon, and Jadx.

Polymorphic Virtualization

Converts raw fields to dynamic bridge accessors, spills private arguments with dynamic invariants, and hides call targets behind bootstrap MethodHandles.

100% JVM Verified

Every single bytecode transform preserves stack map table frames, ensuring zero java.lang.VerifyError exceptions across Java 8 through Java 22.