Converting Images Between Different Formats
There are several different file formats that can be used for images, but not all programs can open all files. If you want to put pictures on your website, for example, you need to use .jpg files, which usually deliver the best quality for photos, or .gif files, which are optimal for illustrations.
The default format used by GIMP is .xcf, which stores additional information about your editing session along with your picture, but this format isn’t widely used in other programs.
You can use GIMP to save your picture in a more widely used format, or to convert a picture between different file formats. First, open the image through the File menu, and then use the File menu to Export. The Export window looks similar to the Save window, but you can click Select File Type (By Extension) at the bottom and choose the file format you’d like to convert the image into.