A graphical user interface builder
, or GUI builder
, also known as GUI designer
is a software development tool
that simplifies the creation of GUIs
by allowing the designer to arrange widgets
using a drag-and-drop WYSIWYG
editor. Without a GUI builder, a GUI must be built by manually specifying each widget's parameters in code, with no visual feedback until the program is run.
User interfaces are commonly programmed using an event-driven architecture, so GUI builders also simplify creating event-driven code. This supporting code connects widgets with the outgoing and incoming events that trigger the functions providing the application logic.
List of GUI builders
List of IDEs with GUI builders
List of GUI builder plugins for IDEs