Swing Explorer is a tool for Swing developers intended for visual exploring of Swing-based application internals. It finds all windows in explored Swing application and displays their component hierarchies as a tree. Each component in the tree can be displayed in the Swing Explorer's work area and visually inspected. Swing Explorer helps to determine sub-components when user moves mouse over them and provides additional information about currently selected component (layout, size, coordinates, border and other things). Additionally it allows to view basic graphical operations used to draw swing components like DebugGraphics does, but in more convenient way.