Every file in your computer has a corresponding size that contributes to the total amount of disk space consumed. A common way in reducing the file sizes without resorting to deleting is by zipping or compressing the files, resulting in files ending with the .zip extension. Opening these ZIP files lets you uncompress them so you can access contents. Use third-party compression tools if you want to adjust the compression levels of these ZIP files so you can make a ZIP file take up as little space as possible.
Use WinZip to apply advanced compression methods to any ZIP files found in your system. WinZip introduces the newer .zipx file extension, which uses advanced algorithms to further decrease the file sizes of various file types. It also supports the legacy ZIP format so you can create ZIP files with maximum compression as well.
Use WinRAR if want to further compress ZIP files in just a few steps. WinRAR adds a quick right-click option called "Convert Archive," which lets you change the compression level of any ZIP file on the spot. It also allows you to create files with the .rar extension, which often provide better compression levels than ZIP formats.
Use 7-Zip if you prefer a free solution in further compressing zip files. 7-Zip features a command-line option that lets you set the level of compression so you can create these compressed files directly from command prompt. It also lets you make 7z files, which can further reduce the size of both RAR and ZIP formats.