| .R3D | Various Developers | Videofiler | REDCODE Video File | Adobe Premiere Pro CC | Adobe Systems Incorporated |
| .RAF | Fuji Xerox | Kamera Ubehandlede Filer | Fuji RAW Image File | Adobe Photoshop Elements | Adobe Systems Incorporated |
| .RAW | Unknown Developer | Kamera Ubehandlede Filer | Raw Image Data File | Adobe Photoshop Elements | Adobe Systems Incorporated |
| .RDT | Adobe Systems Incorporated | Datafiler | Adobe Captivate RoboDemo Template File | Adobe Captivate | Adobe Systems Incorporated |
| .RF | Adobe Systems Incorporated | Datafiler | Adobe FrameMaker Document | Adobe FrameMaker | Adobe Systems Incorporated |
| .RFR | Adobe Systems Incorporated | Datafiler | Adobe Photoshop Frame Filter | Adobe Photoshop | Adobe Systems Incorporated |
| .RL4 | Various Developers | Rasterbilledfiler | Bitmap Image File | Adobe Illustrator CC | Adobe Systems Incorporated |
| .RL8 | Microsoft Corporation | Grafiske Filer | Windows Bitmap Image | Adobe Photoshop | Adobe Systems Incorporated |
| .RLE | Various Developers | Rasterbilledfiler | Run Length Encoded Bitmap | Adobe Photoshop Elements | Adobe Systems Incorporated |
| .RMD | Thomson Reuters Corporation | Datafiler | Reference Manager Data File | Adobe Premiere Pro CC | Adobe Systems Incorporated |
| .RMF | Valve | Spilfiler | Hammer Rich Map Format | Adobe Acrobat DC | Adobe Systems Incorporated |
| .RPF | Rockstar Games | Spilfiler | Grand Theft Auto Data File | Adobe After Effects | Adobe Systems Incorporated |
| .RPLN | Adobe Systems Incorporated | Plug-in-filer | InDesign Required Plug-in File | Adobe InDesign | Adobe Systems Incorporated |
| .RSA | Various Developers | Ikke Almindelige Filer | RSA Certificate File | Adobe Photoshop Elements | Adobe Systems Incorporated |
| .RTA | Adobe Systems Incorporated | Datafiler | RoboHelp RTA Data File | Adobe RoboHelp | Adobe Systems Incorporated |
| .RTK | Adobe Systems Incorporated | Datafiler | Adobe RoboHelp Configuration File | Adobe RoboHelp | Adobe Systems Incorporated |
| .RVL | muvee | Videofiler | Muvee Reveal X Project File | Adobe Revel | Adobe Systems Incorporated |
| .RWL | Leica Biosystems | Kamera Ubehandlede Filer | Leica D-Lux 4 RAW Image | Adobe Photoshop | Adobe Systems Incorporated |
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