Projects / jclasslib bytecode viewer

jclasslib bytecode viewer

jclasslib bytecode viewer is a tool that visualizes all aspects of compiled Java class files and the contained bytecode. In addition, it contains a library that enables developers to read, modify, and write Java class files and bytecode.

Operating Systems

Recent releases

  •  23 May 2014 08:24

    Release Notes: Improved display of CONSTANT_InvokeDynamic_info constant pool entry and the BootstrapMethods class file attribute.

    •  21 May 2014 07:40

      Release Notes: Now displays all new class file attributes in Java 8 and Java 7.

      •  21 Jul 2011 12:36

        Release Notes: This release adds support for Java 7 (class files compiled with -target 1.7), "Copy to clipboard" buttons on the detail panels for "Fields" and "Methods", as well as quicklinks for opcode documentation at the bottom of the bytecode display. Furthermore, the Windows installer is now compatible with Windows 7.

        •  14 Jan 2005 18:58

          Release Notes: This release brings full compatibility with Java 1.5. The new access flags in Java 1.5 (ACC_ENUM, ACC_ANNOTATION, ACC_BRIDGE, and ACC_VARARGS) and the new attributes (all annotation attributes as well as the EnclosingMethod, Signature, and LocalVariableTypeTable attributes) are now displayed in the class file viewer.

          •  28 Aug 2003 12:22

            Release Notes: The bytecode viewer was enhanced. It now supports a configurable class path, cross-class field and method hyperlinks, a class path browser, and the ability to open classes from jar files. A workspace facility was added. Major improvements were made to performance and the display of information.


            Project Spotlight


            A Fluent OpenStack client API for Java.


            Project Spotlight

            TurnKey TWiki Appliance

            A TWiki appliance that is easy to use and lightweight.