The CDR file extension is associated with CorelDRAW, a vector graphics editor developed by Corel Corporation. CDR files are proprietary vector image files that contain drawings, images, text, and effects created in CorelDRAW. Unlike raster images which are composed of pixels, vector images are based on mathematical equations that define points, lines, curves, and polygons. This allows CDR files to be scaled without losing quality, making them ideal for logos, illustrations, and designs intended for print or web use. CDR files can store complex designs with multiple layers, objects, and effects. They support various color models, including RGB, CMYK, and grayscale. While primarily associated with CorelDRAW, other vector graphics editors may offer limited support for opening or importing CDR files, but compatibility can vary. Converting CDR files to more widely supported formats like SVG, AI, or EPS is often necessary for sharing or using them in other applications. The internal structure of the CDR format has evolved over different versions of CorelDRAW, which can sometimes lead to compatibility issues between files created with older and newer versions of the software.