Technologies are described herein for creating and editing dynamic graphics via a World Wide Web (“Web”) interface. A Web service is provided for generating dynamic graphics in response to requests received from client computers. In response to requests from client computers, the Web service generates requested dynamic graphics and returns the generated dynamic graphics to the client computers in response to the requests. Parameters may be provided to the Web service indicating a list of text items, a layout type, a visual style, a color, and other aspects of a dynamic graphic. A user interface is also provided for creating and editing a dynamic graphic within a Web browser application.