Users may select the image file to upload. The image file format must be either JPEG (JPG), PNG, GIF, TIFF (TIF), BMP, and the file must be smaller than or equal to 5 megabytes. Uploaded BMP and TIFF (TIF) images are automatically converted to PNG format.
After the file is uploaded, the user is redirected to a page containing different versions of URLs to the uploaded image. These URLs are preformatted in a variety of HTML and Bulletin Board code snippets, which can be used to hotlink them on websites and message boards.
Images are stored on ImageShack indefinitely unless the image or the user who uploaded it abuses the Terms of Service. The image will be rendered inaccessible if the image uses over 200 megabytes of bandwidth in a one-hour period. If the image in question is not accessed a single time in one year, they will remove it.