: RAR (Roshal Archive), a proprietary format developed by Eugene Roshal.

: Compresses one or more files into a single, smaller package to save storage space and speed up transfers.

: Like any compressed file, it can be used to hide malware or viruses. It is highly recommended that you scan the file with antivirus software before attempting to open it. How to Access the Contents

The file is a compressed archive commonly used to store or transport data more efficiently. Because it is an archive, its contents are hidden and cannot be accessed or run until the file is "extracted" or "unzipped". File Overview

To view or use the files inside , you must use an extraction tool. Windows does not open these files natively. Need to open, create, or convert a RAR file? - WinZip