R File Extensions
Browse file types with extensions beginning with R.
| Extension | File Type | Popularity |
|---|---|---|
| .R | Rez Source Code File | 2.6 |
| .R | R Script File | 3.9 |
| .R | REBOL Script | 1.4 |
| .R | Ratfor Source Code File | 1.8 |
| .R0 | WinRAR Compressed Archive | 3.5 |
| .R00 | WinRAR Compressed Archive | 3.9 |
| .R01 | WinRAR Split Archive Part 1 | 3.3 |
| .R02 | WinRAR Split Archive Part 2 | 2.4 |
| .R03 | WinRAR Split Archive Part 3 | 3.5 |
| .R04 | WinRAR Split Archive Part 4 | 3.0 |
| .R1 | WinRAR Multi-Volume Archive Part 1 | 2.0 |
| .R1M | RealOne Streaming Media File | 2.7 |
| .R2 | WinRAR Multi-Volume Archive Part 2 | 3.3 |
| .R21 | WinRAR Split Archive Part 21 | 2.2 |
| .R2U | R2U Ransomware Encrypted File | 4.0 |
| .R30 | WinRAR Split Archive Part 30 | 3.5 |
| .R3D | REDCODE Video File | 3.3 |
| .R3D | RISA-3D Model File | 2.5 |
| .R3PROJ | RPG Maker 2003 Project | 2.0 |
| .R5A | 7ev3n Ransomware Encrypted File | 3.0 |
| .RA | RealAudio File | 3.4 |
| .RAD | VRAD Lights File | 2.6 |
| .RAD | Citrix Rapid Application Delivery File | 3.0 |
| .RAD | Radiance Scene File | 2.5 |
| .RAD | Reality Adlib Tracker Module | 4.0 |
| .RADIUMKEY2 | Radium 2 License File | 2.3 |
| .RADMAN | RADMAN Ransomware Encrypted File | 2.0 |
| .RADQ | Need for Madness Game Archive | 3.0 |
| .RAF | Fujifilm RAW Image | 4.1 |
| .RAL | WinRail Track Design File | 4.0 |
| .RALDI | Raldi's Crackhouse Game Save | 3.3 |
| .RAM | Real Audio Metadata File | 3.6 |
| .RAP | Raptor Flowchart File | 3.3 |
| .RAP | PlayStation 3 Game Rights File | 1.5 |
| .RAP | Scarab Ransomware Encrypted File | 4.0 |
| .RAR | WinRAR Compressed Archive | 4.2 |
| .RARC | Wii and GameCube Resource Archive | 3.5 |
| .RAS | Sun Raster Graphic | 3.2 |
| .RAS | Remedy Archive System File | 3.2 |
| .RASI | Rofi Configuration File | 3.3 |
| .RASKINLICENSE | Raskin License File | 2.0 |
| .RASKINPLACE | Raskin Place Layout File | 1.5 |
| .RASUNSOFT | OFF Road Game Replay | 3.6 |
| .RAT | PICS Rating File | 1.9 |
| .RATDVD | RatDVD Disk Image | 2.0 |
| .RAV | Rave Reports Project File | 3.0 |
| .RAVI | Radiometric Video File | 3.0 |
| .RAW | Raw Image Data | 3.8 |
| .RAW | Dolphin Virtual SD Card | 3.6 |
| .RAW | Raw Audio Data | 3.4 |
| .RAW | X-ray Diffractometer Results | 1.5 |
| .RAW | Fedora Linux Disk Image | 3.0 |
| .RAW.XXX | In-Process Dolphin Virtual SD Card | 2.0 |
| .RAX | Real Music Store Audio File | 2.0 |
| .RAY | Synopsys Light Ray Data File | 2.5 |
| .RAZOR | Razor Component File | 3.5 |
| .RB | Ruby Source Code | 3.8 |
| .RB | Real Studio Project | 1.6 |
| .RB4 | Resume Builder 4 File | 3.0 |
| .RB4 | RobotWorks Parameters File | 2.0 |
| .RBA | Rock Band Network Song Package | 2.0 |
| .RBC | Retrospect Backup Catalog File | 2.0 |
| .RBC | Rembo-C Script | 3.5 |
| .RBF | Windows Installer Rollback File | 3.4 |
| .RBF | Stellar Insta Backup Image | 3.0 |
| .RBF | Retrospect Backup File | 2.0 |
| .RBF | Redatam Binary File | 2.5 |
| .RBF | LEGO MINDSTORMS EV3 Robot Brick File | 4.0 |
| .RBG | ROBOTC Program | 1.5 |
| .RBJ | XRK Compiled Redcode Object File | 3.0 |
| .RBK | Windows 95 Registry Backup File | 1.7 |
| .RBM | Real Studio Menu File | 1.3 |
| .RBN | Richard's Bridge Notation | 2.0 |
| .RBP | Real Studio Project File | 3.0 |
| .RBS | Rebirth Song File | 2.2 |
| .RBS | Windows Installer Rollback Script | 3.6 |
| .RBS | MP3 Ringtone File | 2.7 |
| .RBT | LEGO MINDSTORMS NXT Program | 3.6 |
| .RBW | Ruby Script | 2.5 |
| .RBW | Real Studio Window File | 2.5 |
| .RBX | Rembo-C Compiled Script | 2.8 |
| .RBXL | Roblox Location | 4.3 |
| .RBXLX | Roblox XML Place File | 4.4 |
| .RBXM | Roblox Model | 4.2 |
| .RBXMX | Roblox Model | 4.4 |
| .RBXS | Roblox Script | 4.5 |
| .RBZ | SketchUp Plugin | 4.2 |
| .RC | Resource Script | 3.8 |
| .RC1 | Samsung Mobile Device Firmware File | 4.0 |
| .RC2 | Visual Studio Resources File | 3.6 |
| .RC2 | Samsung Mobile Device Firmware File | 2.7 |
| .RCD | pcAnywhere Recorded Session File | 3.6 |
| .RCD | LEGO MINDSTORMS Recording File | 2.8 |
| .RCD | KaiOS Audio | 3.0 |
| .RCF | SonicWALL VPN Configuration File | 3.9 |
| .RCG | Recog Character Recognition Set | 3.5 |
| .RCL | Easy CD and DVD Creator 6 Project | 3.0 |
| .RCM | Autodesk Reality Capture Mesh | 3.0 |
| .RCO | PlayStation Portable Resource File | 2.5 |
| .RCPROJECT | iMovie '08 Project | 2.2 |
| .RCPROJECT | Apple Reality Composer Project | 3.5 |
| .RCREC | LogMeIn Remote Control Session Recording | 3.0 |
| .RCRYPTED | Ryuk Ransomware Encrypted File | 2.0 |
| .RCS | RandomControl Scene File | 3.9 |
| .RCT | Visual Studio Resource Template | 2.3 |
| .RCU | RealWorld Layered Cursor Image | 2.7 |
| .RCUT | Webinaria Recording Cut | 3.7 |
| .RCV | RoofCon Viewer Project File | 2.0 |
| .RCV | BIOS Recovery File | 3.0 |
| .RCX | REDCINE-X Project File | 2.0 |
| .RCY | ReCycle 1.x Document | 3.3 |
| .RDA | R Data File | 4.0 |
| .RDATA | R Workspace File | 3.4 |
| .RDB | N64 ROM Database | 3.7 |
| .RDB | Retrospect Backup Set | 4.0 |
| .RDB | Wavelet Video Images File | 3.5 |
| .RDB | Remote Desktop Backup | 3.0 |
| .RDC | IDRISI Raster Documentation File | 3.3 |
| .RDF | Resource Description Framework File | 3.7 |
| .RDF | Reaction Data File | 2.0 |
| .RDF | Report Definition File | 3.3 |
| .RDF | ArcGIS Report Document File | 3.3 |
| .RDF | Relux Project File | 3.1 |
| .RDF | PowerProducer Disc Image | 2.7 |
| .RDF | ReDIF Template | 3.0 |
| .RDG | RDCman Config File | 3.9 |
| .RDI | Rohos Disk Image File | 2.7 |
| .RDL | MicroStation Redline File | 3.3 |
| .RDLC | Visual Studio Client Report Definition File | 3.5 |
| .RDLX | Power View Project File | 4.2 |
| .RDO | Xerox Rawster Document Object File | 3.0 |
| .RDOC | Ruby Document | 2.5 |
| .RDP | Remote Desktop Configuration File | 4.1 |
| .RDR | Remote Desktop Manager Report Settings File | 3.2 |
| .RDS | Ray Dream Studio Scene File | 1.4 |
| .RDSAVE | Rhythm Doctor Data File | 3.5 |
| .RDVXZ | RedVox Infrasound Recorder Audio File | 3.0 |
| .RDW | Real-DRAW Project File | 3.7 |
| .RDZIP | Rhythm Doctor Custom Level | 3.5 |
| .README | Readme File | 3.7 |
| .REAL | Aero Experience | 3.0 |
| .REALITY | Reality 3D Scene Format | 4.0 |
| .REALM | Realm Database | 3.3 |
| .REB | REBOL Script File | 3.0 |
| .REC | Topfield PVR Recording | 3.8 |
| .REC | eJuice Me Up Recipe File | 3.4 |
| .REC | fsck Data Recovery File | 3.7 |
| .RED | CADViewer Redline Markup File | 3.3 |
| .RED | Red Source Code File | 3.5 |
| .REDDITVAULT | Vault Recovery Phrase Backup | 4.0 |
| .REDIF | ReDIF Template | 2.0 |
| .REF | Microsoft Train Simulator Reference File | 3.6 |
| .REF | IDRISI Raster Image Reference File | 3.4 |
| .REFRESH | Visual Studio Refresh File | 3.3 |
| .REG | Registry File | 4.3 |
| .REG | Registration Information File | 3.2 |
| .REGLNK | Registry Editor Shortcut File | 1.8 |
| .REGTRANS-MS | Registry Transaction Log File | 4.3 |
| .REL | Relocatable Module File | 3.8 |
| .RELOC | Windows EXE Relocation Section File | 2.8 |
| .RELS | Open Office XML Relationships File | 3.6 |
| .REM | BlackBerry Encrypted Media | 3.9 |
| .RENSENWARE | Rensenware Encrypted File | 3.5 |
| .REP | Grand Theft Auto Replay File | 4.4 |
| .REP | StarCraft Replay File | 4.1 |
| .REP | dBASE Report | 2.0 |
| .REP | X-Plane Replay File | 3.8 |
| .REPEAKS | REAPER Peak File | 2.0 |
| .REPLAY | Descenders Replay | 3.0 |
| .REPLAY | Rocket League Replay | 3.0 |
| .REPLAY | Geometry Dash ReplayBot Replay | 4.0 |
| .REPLAY | Fortnite Replay File | 3.8 |
| .REPLIT | Replit Project Configuration | 4.0 |
| .REPP | Repp Ransomware Encrypted File | 2.4 |
| .REQ | SSL Certificate Request File | 3.1 |
| .REQ | Canon SD Card Version Request File | 3.5 |
| .RES | C++ Complied Resource Script | 3.9 |
| .RES | Windows Resource File | 3.8 |
| .RES | Valve Resource File | 4.2 |
| .RES | Godot Engine Resource File | 3.7 |
| .RESJSON | Windows JavaScript Resources File | 2.0 |
| .RESMONCFG | Resource Monitor Configuration File | 2.2 |
| .RESOURCES | Visual Studio Resource File | 3.9 |
| .RESS | Unity 3D Model Archive | 4.2 |
| .RESW | Windows Resources File | 3.0 |
| .RESX | .NET Managed Resources File | 3.8 |
| .RET | BusinessObjects Template | 3.6 |
| .RETRO | RetroForth Source Code File | 2.0 |
| .REV | LiveCode Plugin | 1.8 |
| .REV | RAR Recovery Volume Set | 3.9 |
| .REX | ReCycle Loop File | 3.7 |
| .REX | Rexx Source File | 3.0 |
| .REXX | Rexx Source File | 3.7 |
| .REZ | LithTech Game Engine Resource | 4.3 |
| .REZ | Escape Velocity Plug-in File | 4.3 |
| .REZ | FirstClass Resource File | 4.2 |
| .RF | Rammerhead Profile | 3.5 |
| .RFA | Revit Family File | 3.8 |
| .RFA | Battlefield 1942 Game Package | 3.9 |
| .RFB | RoboForm Bookmark File | 3.0 |
| .RFC | RoboForm Contact File | 1.7 |
| .RFC | Ravenfield Content File | 4.5 |
| .RFD | Recogniform Form Designer File | 2.8 |
| .RFF | Blood Group File | 3.5 |
| .RFGS_PC | Red Faction: Guerilla Saved Game File | 3.8 |
| .RFL | Reason ReFill Sound Bank | 2.9 |
| .RFL | Ravenfield Map | 3.5 |
| .RFLW | Edge Reflow Data File | 2.5 |
| .RFM | rFactor Modification File | 3.5 |
| .RFN | RoboForm Safenote File | 4.0 |
| .RFO | RoboForm Option File | 3.6 |
| .RFP | RoboForm Passcard File | 4.0 |
| .RFQ | RoboForm SearchCard File | 2.5 |
| .RFQ | FastCAM RFQ Steel Quote Request | 2.0 |
| .RFT | Revit Family Template File | 2.7 |
| .RFT | RoboForm Identity File | 2.6 |
| .RFU | Remote Firmware Update | 3.8 |
| .RFW | Rockchip Firmware File | 3.0 |
| .RGB | RGB Bitmap | 3.0 |
| .RGD | Raft Saved Game File | 3.0 |
| .RGE | Entourage File Archive | 3.0 |
| .RGF | LEGO MINDSTORMS EV3 Robot Graphics File | 3.8 |
| .RGN | Garmin Regional Map File | 3.2 |
| .RGO | RepliGo File | 4.0 |
| .RGRID | RepGrid File | 2.0 |
| .RGRP | Pro Tools Region Group File | 3.7 |
| .RGS | Registry Script | 3.6 |
| .RGS | Fyrox Game Scene | 2.0 |
| .RGSS2A | RPG Maker VX RGSS Encrypted Archive | 3.0 |
| .RGSS3A | RPG Maker VX Ace RGSS Encrypted Archive | 4.0 |
| .RGSSAD | RPG Maker VX RGSS Encrypted Archive | 3.8 |
| .RGT | Relic Entertainment Game Texture File | 2.6 |
| .RHISTORY | R History File | 3.2 |
| .RHP | Rhino Plug-in | 3.5 |
| .RHR | Script Rehearser Script File | 3.3 |
| .RHTML | Ruby HTML Web Page | 3.6 |
| .RIC | NXT Image File | 2.0 |
| .RIDL | RIDL Type Library File | 2.0 |
| .RIF | Painter Raster Image | 3.2 |
| .RIFF | Painter Raster Image | 3.3 |
| .RIG | vRigger Design File | 3.6 |
| .RIM | BioWare Resource Image File | 3.3 |
| .RIP | Hit'n'Mix Audio Mashup File | 4.0 |
| .RIQ | Heaven Studio Remix | 4.0 |
| .RIS | Research Information Systems Citation File | 3.5 |
| .RISE | RISE Editor Model File | 3.0 |
| .RIT | SecurITree Attack Tree | 2.0 |
| .RJS | Ruby Javascript File | 4.0 |
| .RJS | RealJukebox Skin File | 3.6 |
| .RK | WinRK Archive | 3.4 |
| .RKT | Racket Source Code File | 2.3 |
| .RKV | Merkury Archive | 2.0 |
| .RL | R.viewer List File | 3.5 |
| .RLE | Run Length Encoded Bitmap | 2.7 |
| .RLF | ArcGIS Report Layout File | 3.3 |
| .RLI | RealWorld Graphics Layered Image | 3.3 |
| .RLIB | Static Rust Library | 2.0 |
| .RLL | Microsoft Resource Library | 4.0 |
| .RLS | Symbian Localization File | 3.4 |
| .RM | RealMedia File | 3.6 |
| .RMA | Rhapsody DRM License Data File | 2.0 |
| .RMBAK | Registry Mechanic Backup File | 3.7 |
| .RMD | R Markdown File | 3.8 |
| .RMD | Reference Manager Data File | 3.2 |
| .RMD | RED Metadata File | 2.8 |
| .RMF | Adobe Rights Management Document | 2.3 |
| .RMF | Hammer Rich Map Format | 3.6 |
| .RMGB | RootsMagic Backup File | 1.3 |
| .RMGC | RootsMagic Data File | 3.3 |
| .RMH | Rights-Managed HTML Document | 2.0 |
| .RMI | RMID MIDI File | 3.3 |
| .RMJ | Real Media Jukebox Audio File | 3.9 |
| .RML | Redline Markup Language File | 2.5 |
| .RML | Elixir Report Template File | 3.8 |
| .RML | RimWorld Modlist | 2.0 |
| .RMM | RAM Meta File | 1.5 |
| .RMMZPROJECT | RPG Maker MZ Project | 3.0 |
| .RMMZSAVE | RPG Maker MZ Save File | 2.2 |
| .RMP | RealPlayer Metadata Package File | 3.1 |
| .RMP | Magellan Raster Map File | 3.4 |
| .RMR | ResumeMaker File | 3.5 |
| .RMS | Secure Real Media File | 3.7 |
| .RMS | Java Application Settings File | 4.2 |
| .RMSKIN | Rainmeter Skin File | 4.2 |
| .RMT | Router Firmware File | 4.4 |
| .RMT | Raster Music Tracker Song File | 4.0 |
| .RMVB | RealMedia Variable Bit Rate File | 3.8 |
| .RMX | RealJukebox Format | 3.8 |
| .RMX | Reference Manager Index File | 1.7 |
| .RNA | SnapGene RNA File | 2.0 |
| .RNC | RELAX NG Compact Syntax File | 3.0 |
| .RNC | RNC ProPack Archive | 3.4 |
| .RND | PGP Random Seed File | 3.7 |
| .RND | Random Hash Data File | 3.2 |
| .RNG | Nokia Composer Ringtone | 3.0 |
| .RNG | RELAX NG File | 2.5 |
| .RNQ | Renque Model File | 3.0 |
| .RNQS | Universal Pokemon Randomizer Settings | 2.0 |
| .RNS | Reason Song File | 3.8 |
| .RNX | RealPlayer Settings File | 4.0 |
| .ROA | Rivals of Aether Replay | 3.5 |
| .ROADTRIP | Road Trip Planner File | 3.8 |
| .ROCA | RIB office Compressed Archive | 2.0 |
| .ROCK | Rockbox Plug-in | 3.0 |
| .ROD | Actuate Report Object Design File | 2.5 |
| .ROD | RIB office Database File | 3.8 |
| .ROD | Ancestry Genealogical Database File | 2.0 |
| .RODL | RemObjects Definition Language File | 3.0 |
| .RODX | Ancestry Genealogical Database File | 3.3 |
| .RODZ | Ancestry Genealogical Database File | 3.0 |
| .ROFL | League of Legends Replay File | 3.6 |
| .ROI | Report Object Instance | 2.7 |
| .ROKU | Roku TV Firmware Update | 2.5 |
| .ROL | Ad Lib Synthesized Instrument | 3.8 |
| .ROM | Read Only Memory Image | 4.1 |
| .ROM | N64 Game ROM File | 3.3 |
| .ROM | Killing Floor Map File | 2.4 |
| .RON | Rusty Object Notation File | 3.3 |
| .ROQ | RoQ Full Motion Video | 3.0 |
| .ROS | BattleScribe Roster Editor File | 4.2 |
| .ROT | Homeworld 2 Graphics File | 3.7 |
| .ROTEST | RemObjects SDK Test File | 2.7 |
| .ROTESTRESULT | RemObjects SDK Test Results File | 2.0 |
| .ROU | Gerber Route File | 3.0 |
| .ROV | Report Object Variable | 4.0 |
| .ROX | Roxio Project File | 3.8 |
| .ROX | Actuate Report Object Executable File | 3.6 |
| .ROXIO | Roxio Project | 2.4 |
| .ROZ | aSc TimeTables Schedule File | 3.8 |
| .RP | Axure RP Project File | 3.7 |
| .RP | RealPix Clip | 1.7 |
| .RP9 | RetroPlatform Disk Image Archive | 3.3 |
| .RPA | RIB Project Archive File | 3.6 |
| .RPA | Ren'Py Archive | 4.0 |
| .RPB | Radmin Phonebook File | 2.0 |
| .RPD | Roleplay Designer Data File | 2.0 |
| .RPD | RIB Project Database File | 3.4 |
| .RPE | OPC Router Configuration 4 Project | 4.2 |
| .RPF | Rich Pixel Format File | 3.6 |
| .RPF | Grand Theft Auto Data File | 4.3 |
| .RPG | DTPS Robot Program | 2.0 |
| .RPGMVM | RPG Maker MV Encrypted M4A File | 2.8 |
| .RPGMVO | RPG Maker MV Encrypted OGG File | 2.3 |
| .RPGMVP | RPG Maker MV Encrypted PNG File | 3.5 |
| .RPGPROJECT | RPG Maker MV Project | 2.0 |
| .RPGSAVE | RPG Maker MV Save File | 4.2 |
| .RPI | Render Plug-in | 1.8 |
| .RPJ | Real Pac Batch Job File | 3.8 |
| .RPK | RadLight Media Player Skin | 3.3 |
| .RPKG | Symbian OS Z Drive ROM | 2.0 |
| .RPKG | Hitman Game Patch Archive | 3.6 |
| .RPL | Toribash Replay | 4.0 |
| .RPL | BeamNG.Drive Replay | 4.0 |
| .RPL | Dolby Cinema Print Master File | 3.0 |
| .RPL | Special Force Replay | 3.8 |
| .RPLIB | Axure RP Widget Library File | 3.0 |
| .RPLN | InDesign Required Plug-in File | 4.3 |
| .RPM | Red Hat Package Manager File | 3.8 |
| .RPMNEW | Red Hat Package New Default Configuration | 2.0 |
| .RPMSAVE | Red Hat Package Saved Configuration | 2.5 |
| .RPMSG | Outlook Restricted Permission Message | 3.5 |
| .RPP | REAPER Project File | 3.3 |
| .RPPRJ | Axure RP Shared Project File | 3.0 |
| .RPRES | R Presentation File | 3.0 |
| .RPROJ | R Project | 4.2 |
| .RPS | 3ds Max Render Preset Settings | 4.0 |
| .RPT | Crystal Reports File | 3.5 |
| .RPT | Generic Report | 3.7 |
| .RPT | AccountEdge Report | 3.5 |
| .RPTR | RafflePrinter Document | 2.0 |
| .RPTR | Crystal Reports Read-Only File | 2.0 |
| .RPV | RealPlayer Visualization File | 2.8 |
| .RPX | Report XML File | 2.3 |
| .RPX | Wii U Game | 3.6 |
| .RPY | Python Script | 3.8 |
| .RPY | Touhou Project Replay File | 4.1 |
| .RPY | Ren'Py Script | 4.1 |
| .RPYB | Ren'Py Bytecode File | 3.4 |
| .RPYC | Ren'Py Compiled Script | 4.2 |
| .RRA | vRigger Rigging Gear File | 3.4 |
| .RRBB | RRBB Ransomware Encrypted File | 2.0 |
| .RRD | Reduced Resolution Dataset File | 2.2 |
| .RRF | Rechroma Resource Format | 2.0 |
| .RRI | RealWorld Image | 2.3 |
| .RRR | Registry Mechanic Backup File | 1.8 |
| .RRR | Grand Theft Auto: San Andreas or IV Vehicle Path | 2.0 |
| .RRT | Rhapzode Resource Template | 2.5 |
| .RS | Rust Source Code File | 4.0 |
| .RS | RapidSketch Document | 2.1 |
| .RSA | RSA Certificate File | 3.9 |
| .RSA | Minecraft JAR Codesign File | 3.5 |
| .RSB | Red Storm Bitmap File | 2.3 |
| .RSC | Symbian Application Compiled Resource File | 3.6 |
| .RSCOLLECTION | RetroShare Collection | 2.0 |
| .RSD | RealSQLDatabase File | 2.6 |
| .RSD | RadSound Audio File | 1.5 |
| .RSD | Rosetta Stone Data File | 3.3 |
| .RSDF | RapidShare Download File | 3.6 |
| .RSDK | Retro SDK Archive | 4.0 |
| .RSF | Recovery State File | 3.4 |
| .RSF | LEGO MINDSTORMS EV3 Robot Sound File | 3.9 |
| .RSG | RaySupreme Graph | 4.0 |
| .RSM | WinWay Resume Deluxe Resume File | 3.5 |
| .RSM | RouterSim Network Visualizer File | 3.6 |
| .RSN | Reason Project File | 3.0 |
| .RSO | NXT Brick Audio File | 3.5 |
| .RSO | ARIS Report Script Object File | 1.5 |
| .RSP | RSLogix PLC Program File | 3.5 |
| .RSP | C# Compiler Response File | 3.5 |
| .RSR | Poser Model Preview File | 3.6 |
| .RSR | Rolling Sky Remake Level | 4.4 |
| .RSRC | Macintosh Resource File | 3.5 |
| .RSS | Rich Site Summary | 3.5 |
| .RSS | Symbian Application Resource File | 3.0 |
| .RSS | RAM Structural System Model File | 3.1 |
| .RST | reStructuredText File | 3.5 |
| .RST | IDRISI Raster Image | 2.4 |
| .RSV | RSView32 Project File | 4.1 |
| .RSW | R&R SQL Report Writer Report File | 2.0 |
| .RSX | RED Metadata XML File | 3.3 |
| .RS~ | Rust Source Code Development File | 2.0 |
| .RT | RealText Streaming Text File | 3.2 |
| .RTA | RoboHelp RTA Data File | 3.8 |
| .RTA | TrueRTA Project File | 3.5 |
| .RTC | Live Meeting Connection File | 3.4 |
| .RTD | Robot Structural Analysis Design File | 4.2 |
| .RTD | RagTime Document | 2.5 |
| .RTE | RTE Encoded File | 3.9 |
| .RTE | Navigation Route | 3.1 |
| .RTE | Revit Project Template | 3.3 |
| .RTF | Rich Text Format File | 3.5 |
| .RTFD | Rich Text Format Directory File | 3.2 |
| .RTI | Real Tracker Instrument | 3.5 |
| .RTL | Raster Transfer Language File | 3.4 |
| .RTM | LabVIEW Run-Time Menu File | 3.9 |
| .RTP | Gromacs Residue Topology Parameter File | 3.7 |
| .RTS | Royal TS Remote Connection File | 3.3 |
| .RTS | RealPlayer Streaming Media | 2.0 |
| .RTS | Real Tracker Sample | 2.7 |
| .RTSTN | Audials Station File | 2.0 |
| .RTTEX | Robinson Technologies Texture File | 4.0 |
| .RTTTL | Ring Tone Transfer Language File | 4.0 |
| .RTWSH | Radiotracker Wishlist File | 4.0 |
| .RTX | Rich Text Document | 3.5 |
| .RUEL | Revo Uninstaller Pro Log | 1.7 |
| .RUL | InstallShield Rules File | 3.8 |
| .RULESET | Visual Studio Code Analysis Rule Set File | 3.5 |
| .RUM | Bink Video Subtitle File | 3.3 |
| .RUMBA | RUMBA Ransomware Encrypted File | 2.0 |
| .RUN | Linux Executable File | 4.2 |
| .RUN | Rune Map File | 3.7 |
| .RUN | Runscanner Scan File | 3.4 |
| .RV | RealVideo File | 3.3 |
| .RVDATA | RPG Maker VX Data File | 4.2 |
| .RVDATA2 | RPG Maker VX Ace Data File | 3.8 |
| .RVF | RichView Format File | 3.3 |
| .RVG | RVG X-ray Image | 2.4 |
| .RVID | Snapz Pro X Recorded Video File | 3.0 |
| .RVL | muvee Reveal X Project File | 3.0 |
| .RVL | Adobe Revel Library File | 2.5 |
| .RVPROJ | RPG Maker VX Project File | 3.6 |
| .RVPROJ2 | RPG Maker VX Ace Project File | 4.8 |
| .RVT | Revit Project File | 3.6 |
| .RVX | Real Protected Video File | 2.7 |
| .RVZ | Compressed Wii / GameCube ROM | 4.0 |
| .RW2 | Panasonic RAW Image | 4.0 |
| .RW3 | RapidWeaver 3 Site File | 3.7 |
| .RW4 | RenderWare 4 3D Model | 2.5 |
| .RWD | NRG Raw Wind Data File | 4.3 |
| .RWD | Microsoft Flight Simulator Rewards File | 3.0 |
| .RWL | Leica RAW Image | 3.1 |
| .RWLIBRARY | Paperless Receipt Library | 3.0 |
| .RWP | RapidWeaver Package | 2.4 |
| .RWPLUGIN | RapidWeaver Plugin | 4.0 |
| .RWS | Retina Wireless Scanner File | 1.3 |
| .RWS | RenderWare Stream | 3.3 |
| .RWS | RimWorld Game Save File | 4.6 |
| .RWSNIPPET | RapidWeaver Snippet File | 2.0 |
| .RWSTYLE | RapidWeaver Style File | 3.0 |
| .RWSW | RapidWeaver Site File | 2.5 |
| .RWT | ReadWriteThink Printing Press Draft | 2.0 |
| .RWT | ReadWriteThink Timeline | 3.4 |
| .RWTHEME | RapidWeaver Theme | 2.0 |
| .RWZ | Outlook Rules Wizard File | 3.8 |
| .RWZ | Rawzor Compressed Image | 3.9 |
| .RX2 | REX2 Audio File | 3.9 |
| .RXC | Roxio Certificate File | 3.2 |
| .RXDATA | RMXP Data File | 3.8 |
| .RXDOC | iZotope RX Document | 2.0 |
| .RXE | Lego Mindstorms NXT Executable Program | 3.9 |
| .RXR | RecordXR Recording | 4.3 |
| .RXT | Retrospect Backup Extension | 3.0 |
| .RYK | Ryuk Ransomware Encrypted File | 3.0 |
| .RZ | Rzip Compressed File | 3.7 |
| .RZB | Red Zion Book File | 3.6 |
| .RZK | File Crypt Password File | 2.3 |
| .RZK | Red Zion Key File | 4.3 |
| .RZN | Red Zion Notes File | 3.0 |
| .RZS | Red Zion Security File | 3.7 |
| .RZX | File Crypt Encrypted File | 2.5 |
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