File compression is the process of packaging files and folders into a compressed archive that uses less space on your hard disk, allowing you to store more data on your computer. The smaller size of a compressed archive also makes it faster and easier to share over the internet. File archivers can further protect your compressed data with a layer of encryption that requires a password before the files can be extracted.
7-Zip is an open-source file archiver that uses 7z as its primary format to achieve a high compression ratio. It supports unpacking all common archives including ZIPs, RARs, and TARs.
WinRAR is the only file archiver that can compress files into RAR archives, a proprietary format that supports advanced NTFS file system options as well as data redundancy for recovering data from damaged archives.
RAR File Open Knife is a tool for extracting RAR archives as fast as possible. Simply drag your RAR files into the tool and watch them extract.