In order to zip and unzip files, you need a zip utility program such as PentaZip, PicoZip, PKZip, PowerArchiver, Stuffit or WinZip. If you don't know which zip utility to pick, most programs offer a 30-day limited trial period that allows you to download and try the zip utility for free. Most zip utilities automatically integrate with Windows Explorer to include zip commands in the shortcut menu.
Find the Excel file that you want to create a .zip file for and right click on it.
In the drop-down shortcut menu that appears, click on the "Zip" option. It may be listed as "Add to Archive" or may be listed in a folder under the zip utility's name to create a .zip file with the same name. If you want to add the Excel file to a previously existing .zip file, click the option called "Add to Zip file." Creating a .zip file is also known as "archiving" the file. Zipping large files can save 80 percent or more in hard disk space.