WinRARs main features are very strong general and multimedia compression, solid compression, archive protection from damage, processing of ZIP and other non-RAR archives, scanning archives for viruses, programmable self-extracting archives(SFX), authenticity verification, NTFS and Unicode support, strong AES encryption, support of multivolume archives, command line and graphical interface, drag-and-drop facility, wizard interface, theme support, shell integration, Vista/Windows 7 shell extensions, profile-based backup feature.
In addition to its capacity as a file archiver, WinRAR can also be used to encrypt files using AES-128 encryption. It also has the ability to create self-extracting and multi-volume archives. Self-extracting archives are useful for distributing large files to people who may not have WinRAR or a similar program installed on their computers. Multi-volume archives can be used to split large files into smaller parts, making them easier to store and share.