Java Decompiler Online
Upload .class or .jar files to view decompiled Java: class structure, fields, and method signatures. Runs entirely in your browser; no upload to servers.
Java Decompiler
Upload a .class file or JAR to view decompiled Java source (class structure, fields, and method signatures)
Drop .class or .jar file here, or browse
Supports single .class files and .jar archives (multiple classes)
What does the Java decompiler show?
It extracts class name, fields, and method signatures from .class or .jar files. Useful for inspecting libraries or debugging without source.
Is it safe?
Yes. Files are processed in your browser only. Nothing is sent to any server.