A 2D image is a flat representation of visual information, typically created using pixels in a grid format. These images can be photographs, drawings, or digital graphics, and they have only two dimensions: width and height. Common file formats for 2D images include JPEG, PNG, and GIF. 2D images are widely used in various fields, including graphic design, advertising, and web development. They can be displayed on screens, printed on paper, or used in digital media. Unlike 3D images, 2D images do not have depth, making them simpler to create and manipulate.