Program compresses larger files in to a smaller file?

WinRAR or WinZip are probably the most popular programs that compress a file or group of files into a single smaller file. Similar extraction programs must un-compress the files before using them in a word processing, imaging, or assigned application. There are also free programs available that will compress and extract files available many places on the Internet. download.cnet.com is my favorite.

It's easy for Windows users to forget that WinZip isn't the only file-compression utility in the world. Like its better-known competitors, the free 7-Zip unpacks a host of archive formats, including ZIP, TAR, GZ, and its own 7z format. Unlike WinZip, though, it can create TAR and GZ archives, which are commonly used on Unix and Linux systems.