RAR (file format)
Filename extension.rar, .rev, .r00, .r01 Internet media type application/x-rar-compressed Uniform Type Identifier (UTI) com.rarlab.rar-archive Magic number 52 61 72 21 1A 07 00 (RAR 1.5 to 4.0) 52 61 72 21 1A 07 01 00 (RAR 5+) Developed by Eugene Roshal Initial release March 1993 Type of format archive format decompression source code is available, but it's not free software due to the restriction that it must not be used to reverse engineer the RAR compression algorithm).