xcf A .xcf extension file is a Raster image file format that is used by the GNU Image Manipulation Program. It is a freeware image editing software application that has features similar to Adobe Photoshop. These features include the easy selection of layers, channels, transparencies, paths and guides. It facilitates saving of the edited versions of the images and storing the current position at the time of saving, layers, channels, paths and other items used at the time of editing the image. The image data is saved in the file by compressing it with the use of a simple RLE algorithm, and all those settings can be accessed again to edit the image when the XCF file is opened in a compatible image editor.
jpg The .jpg filename extension refers to digital photography files or digital images that are associated with the JPEG file format specification. The joint photographic experts group, or JPEG for short, is a file format from the 'lossy image' class of image formats. Many devices including smartphones with inbuilt cameras and professional digital SLR cameras support the JPEG/Exif file format natively. Such support allow images captured on these devices to be stored directly into the jpg format without conversion. Efforts towards standardization of the JPEG format first begun in 1992 with ISO/IEC 10918-1:1994