freeinternals

Java Class Viewer

Watch the Java class file visually & interactively for the meaning of every byte.

Download

Download Application: http://sourceforge.net/projects/javaclassviewer/files/JavaClassViewer.zip/download
Download Source Code: http://sourceforge.net/projects/javaclassviewer/files/JavaClassViewer-SourceCode.zip/download

Document

Programming Logic: http://www.codeproject.com/Articles/35915/Java-Class-Viewer

Binary Internals Viewer

An application to show binary file structure in structured way.

BMP file
JPEG file
PNG file
ZIP file
PDF file (in progress)