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"Every File Extension in the World"

This is a list of file extension names or suffixes that indicate the format or usage of a file and a brief description of that file extension. In general, if you have the program that uses that file extension, that program can be used to open or otherwise use the file.

Many people have contributed to this list and we thank them! If you know of file extensions that should be added to this list, please e-mail us and we'll add them.

 File Extension Listing for "R":
Browse File Extensions Alphabetically:  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z #
RResource file (Pegasus Mail)
RRatfor file (FORTRAN Preprocessor)
R8Raw graphics (One byte per pixel) plane one (PicLab)
R8PPcl 4 bitmap font (Intellifont)
RARealMedia streaming audio file
RADRadar data file (Radar ViewPoint)
RAMRealMedia metafile
RAOReadAllOver (YOUniverse)
RARWinRAR Compressed Archive
RARJava JCA Resource Adapter Module
RASBitmap (Sun Raster Images)
RATDatafile (RATS)
RAVNorton Antivirus file
RAVRave file (used by programmers)
RAWRaw signed PCM data
RAWRaw signed PCM data
RAWRaw File Format (bitmap)
RBFDatafile (Rbase)
RBHMaintained by RoboHELP, the RBH file adds to the information contained in the Help project file
RCResource script (Borland C++)
RCConfiguration file (emacs)
RCResource script (Micosoft C/C++)
RCGNewsgroup file (Netscape)
RD1Registered level file (Descent1)
RDFCompiled UIC source code (Geoworks UI Compiler)
RDFResearch document information format
RDFResource Description Framework file (related to XML and metadata)
RDIDevice-independent bitmap file
RDLRegistered Level file (Descent)
RDXDatafile (Reflex)
RDZRemoteDocs compressed and encrypted file
RECRecorded macro (Microsoft Windows 3.x)
RECVoice file (RapidComm)
RECRecord file (Sprint)
RECDatafile (EpiInfo)
REDPath information file (Clarion Modula-2)
REFReference file (Generic)
REGRegistration file (Corel)
REGOLE registration file (Microsoft Windows 3.x)
REGRegistration file
REMRemarks file (Generic)
REPReport file (Visual dBase)
REPReport file (Report Designer)
REPReport file (DataBoss)
REPReport file (CodeReporter)
REPReply file (QWK Reader)
REQRequest file (Generic)
RESCompiled resource file (Borland C++)
RESResource file (dBase IV)
RESResource file (Microsoft Visual C++)
REVRevision file (GeoWorks)
REXReport definition (Oracle)
REXSource code file (REXX)
REZResource file (Generic)
RFRaster graphics file (Sun)
RFTRevisable Form Text (part of IBM's DCA or Document Content Architecture)
RGB, SGIRGB files (Silicon Graphics)
RGXSymbol tables (ReaGeniX code generator)
RHResource header file (Borland C++ 4.5)
RIData file (Lotus 1-2-3)
RIBGraphics in Renderman format (3DReality)
RICFax document (Ricoh)
RIFImage file (Metacreations Painter 5)
RIFRIFF bitmap graphics (Fractal Design Painter)
RIPGraphics (remote access)
RIXBitmap graphics (ColorRIX VGA Paint)
RL1Regestered level file (Descent1)
RL2Registered level file (Descent2)
RL4Bitmap graphics file
RL8Bitmap graphics file
RLAWavefront raster image (SDSC Image Tool)
RLBData file (Harvard Graphics Win 9.x)
RLCGraphics file (1 bit per pixel scanner output file)
RLERun-Length Encoded bitmap (SDSC Image Tool)
RLZRealizer source code file (CA-Realizer)
RMVideo file (RealAudio)
RMBRegistryMaster branch
RMDDocument (Microsoft RegMaid)
RMFRich music format (Beatnik)
RMFRich Map Format (used by 3-D game editors to store a map)
RMIMIDI music
RMKMakefile (Clipper RMake)
RMVBRealVideo Variable Bit Rate File
RNXpl Program file (Nota Bene)
RNDRendering slide (AutoCAD-AutoShade)
RNORunoff file (VAX)
ROLFM music Adlib Music file (Roland)
ROMCartridge-based home video game emulator file (exact copy of ROM contents in cartridges from Atari 2600, Colecovision, Sega, Nintendo, etc.; not interchangeable between emulators)
ROQId software game file
ROVData file (Rescue Rover)
RPDDatabase (RapidFire)
RPLVideo file (Tomb Raider)
RPLText document (Replica)
RPMPackage Manager (RedHat Linux)
RPSBorland Translation Repository
RPTCrystal Reports file ( and a sub-set of Microsoft Visual Basic)
RRSSaved game file (Ace Road Rash)
RSDatafile (Amiga Resource Reassembler)
RS_Resource fork file (Macintosh Mac-ette)
RSBRed Storm bitmap (Rainbow 6 (Game) and several image editing programs)
RSCResource file (Generic)
RSLParadox 7 reports (Broderland)
RSMResume file (WinWay Resume Writer)
RSPResponse file (Generic)
RTCRich Text Compressed file
RTFHelp file script (Microsoft Windows 9.x)
RTFRich Text Format document
RTKUsed by RoboHELP to simulate the search feature of Windows help
RTLText file (Generic)
RTLRun Time library (NU 7.0)
RTMMusic module (MOD) (Real Tracker)
RTPSoftware update package data file (RTpatch)
RTSRuntime library file (CA-Realizer)
RTSRoboHELP to speed complex operations
RTSRTSL document (RealAudio)
RULExtension used in InstallShield
RUNCompiled output p-code file (Softworks basic compiler) (SoftworksLtd)
RVPScan Configuration file (MIME) (Microsoft)
RVWReview file (Generic)
RWSResource Workshop data file (Borland C++)
RWXScript file (RenderWare)
RXXRAR compressed files from a multi-volume archive (xx = a number from 01 to 99)
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Browse File Extensions Alphabetically:  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z #
Current file name extensions and definitions as of 11/7/2009: 3536

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