Browse Definitions:
File Extension

RAR File Format

WinRAR Compressed Archive

RAR file format icon

RAR is a compressed archive file format used by the WinRAR archival software. A RAR archive may contain one or more files and archives may span multiple files. Multiple files are often used to break up the archive for storage on media smaller than the archive. 

RAR features stronger compression than a zip file and though it is a proprietary format it is used in other compression software, like 7-zip, for its 7Z files. Usually, WINRAR archives have a RAR extension; however, spanned archives often have a .R00-.R99 extension.

RAR comes from the name of its developer, Eugene Roshal, for Roshal’s ARchive.  

MIME type: application/rar, application/x-rar-compressed


Learn more about .RAR files:

Visit the RARlab Web page.

Search for answers to .RAR-related questions at

This was last updated in August 2010
Browse File Extensions Alphabetically:

Start the conversation

Send me notifications when other members comment.

By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Please create a username to comment.



  • internal audit (IA)

    An internal audit (IA) is an organizational initiative to monitor and analyze its own business operations in order to determine ...

  • pure risk (absolute risk)

    Pure risk, also called absolute risk, is a category of threat that is beyond human control and has only one possible outcome if ...

  • risk assessment

    Risk assessment is the identification of hazards that could negatively impact an organization's ability to conduct business.


  • principle of least privilege (POLP)

    The principle of least privilege (POLP), an important concept in computer security, is the practice of limiting access rights for...

  • identity management (ID management)

    Identity management (ID management) is the organizational process for identifying, authenticating and authorizing individuals or ...

  • zero-day (computer)

    A zero-day vulnerability, also known as a computer zero day, is a flaw in software, hardware or firmware that is unknown to the ...



  • business continuity and disaster recovery (BCDR)

    Business continuity and disaster recovery (BCDR) are closely related practices that describe an organization's preparation for ...

  • business continuity plan (BCP)

    A business continuity plan (BCP) is a document that consists of the critical information an organization needs to continue ...

  • call tree

    A call tree -- sometimes referred to as a phone tree -- is a telecommunications chain for notifying specific individuals of an ...



  • hybrid hard disk drive (HDD)

    A hybrid hard disk drive is an electromechanical spinning hard disk that contains some amount of NAND Flash memory.