| .ASO | Adobe Systems Incorporated | Developer Files | ActionScript Object | Adobe Creative Cloud | Adobe Systems Incorporated |
| .ASP | Microsoft Corporation | Web Files | Active Server Page | Adobe Dreamweaver | Adobe Systems Incorporated |
| .ASPX | Microsoft Corporation | Web Files | Active Server Page Extended ASP.NET Script | Adobe Dreamweaver | Adobe Systems Incorporated |
| .ASR | Adobe Systems Incorporated | Web Files | ActionScript Remote Document | Adobe Dreamweaver | Adobe Systems Incorporated |
| .AST | Apple | Data Files | ClarisWorks Assistant File | Adobe Illustrator CC | Adobe Systems Incorporated |
| .ASV | MakeMusic, Inc. | Backup Files | Finale Auto-save File | Adobe Photoshop CC | Adobe Systems Incorporated |
| .AT2 | Adobe Systems Incorporated | Data Files | Adobe Persuasion Auto Template | Aldus PhotoStyler | Adobe Systems Incorporated |
| .ATF | Molecular Devices | Data Files | Axon Text File | Adobe Photoshop CC | Adobe Systems Incorporated |
| .ATN | Adobe Systems Incorporated | Settings Files | Photoshop Actions File | Adobe Photoshop CC | Adobe Systems Incorporated |
| .AU | Open Source | Audio Files | Audacity Audio File | Adobe Audition | Adobe Systems Incorporated |
| .AVA | Open Source | eBook Files | AvaaBook eBook | Adobe Photoshop | Adobe Systems Incorporated |
| .AVS | Adobe Systems Incorporated | Data Files | Adobe Photoshop Variations File | Adobe Photoshop | Adobe Systems Incorporated |
| .AWE | Adobe Systems Incorporated | Settings Files | Adobe Acrobat Bookmark XML Data | Adobe Creative Cloud | Adobe Systems Incorporated |
| .AWF | Adobe Systems Incorporated | 3D Image Files | Adobe WorkFlow Workgroup Plugin | Adobe Creative Cloud | Adobe Systems Incorporated |
| .AXT | Adobe Systems Incorporated | Settings Files | Adobe Photoshop Extract File | Adobe Photoshop CC | Adobe Systems Incorporated |
| .BC | BitComet Development Group | Uncommon Files | BitComet Partially Downloaded File | Adobe Bridge CC | Adobe Systems Incorporated |
| .BCM | Adobe Systems Incorporated | Data Files | Adobe Bridge Cache File | Adobe Bridge CC | Adobe Systems Incorporated |
| .BCP | Blackmagic Design | Settings Files | BlackMagic Custom Palette | Adobe Photoshop | Adobe Systems Incorporated |
| .BCT | Adobe Systems Incorporated | Data Files | Adobe Bridge Thumbnail Cache File | Adobe Bridge CC | Adobe Systems Incorporated |
| .BDL | Parametric Technology Corporation | CAD Files | CoCreate Bundle File | Adobe Acrobat DC | Adobe Systems Incorporated |
| .BITMAP | Various Developers | Raster Image Files | Bitmap Image File | Adobe Illustrator CC | Adobe Systems Incorporated |
| .BK | Adobe Systems Incorporated | Data Files | FrameMaker Book File | Adobe FrameMaker | Adobe Systems Incorporated |
| .BLA | Adobe Systems Incorporated | Data Files | Adobe Black Colour Separation Data | Adobe Creative Cloud | Adobe Systems Incorporated |
| .BLW | Adobe Systems Incorporated | Settings Files | Adobe Photoshop Black And White Presets File | Adobe Photoshop CC | Adobe Systems Incorporated |
| .BLZ | Nokia | Game Files | N-Gage Mobile Video Game File | Adobe Photoshop | Adobe Systems Incorporated |
| .BMP | Various Developers | Raster Image Files | Bitmap Image File | Adobe Illustrator CC | Adobe Systems Incorporated |
| .BMZ | Valve | Game Files | Portal Bonus Map Zip File | Adobe Photoshop | Adobe Systems Incorporated |
| .BOOK | Adobe Systems Incorporated | Data Files | FrameMaker Book File | Adobe FrameMaker | Adobe Systems Incorporated |
| .BPDX | Adobe Systems Incorporated | Uncommon Files | Acrobat Batch PDX File | Adobe Acrobat DC | Adobe Systems Incorporated |
| .BRIDGESORT | Adobe Systems Incorporated | Settings Files | Adobe Bridge Cabinet | Adobe Bridge CC | Adobe Systems Incorporated |
| .BRS | Adobe Systems Incorporated | Data Files | RoboHelp Browse Sequence File | Adobe RoboHelp | Adobe Systems Incorporated |
| .BUC | Adobe Systems Incorporated | Backup Files | Adobe Photoshop Elements Backup File | Adobe Photoshop Elements | Adobe Systems Incorporated |
| .C4D | MAXON Computer | 3D Image Files | Cinema 4D Model File | Adobe After Effects | Adobe Systems Incorporated |
| .CACHE | Various Developers | Uncommon Files | Cache File | Adobe Photoshop | Adobe Systems Incorporated |
| .CAL | Newera Software Technology, Inc. | Raster Image Files | CALS Raster File | Adobe Photoshop | Adobe Systems Incorporated |
| .CALS | Newera Software Technology, Inc. | Raster Image Files | CALS Raster File | Adobe Photoshop | Adobe Systems Incorporated |
| .CATPRODUCT | Dassault Systèmes | CAD Files | CATIA V5 Assembly File | Adobe Acrobat DC | Adobe Systems Incorporated |
| .CCT | Adobe Systems Incorporated | Data Files | Director Protected Cast Resource | Adobe Director | Adobe Systems Incorporated |
| .CDR | Corel | Vector Image Files | CorelDRAW Vector Image File | Adobe Illustrator CC | Adobe Systems Incorporated |
| .CEF | Richard Stott | Data Files | Class Action Gradebook Elementary File | Adobe Illustrator CC | Adobe Systems Incorporated |
| .CEL | Affymetrix | Data Files | Affymetrix Probe Results File | Adobe Audition | Adobe Systems Incorporated |
| .CER | Microsoft Corporation | Web Files | Internet Security Certificate | Adobe Acrobat DC | Adobe Systems Incorporated |
| .CFA | Frontline | Data Files | ComProbe Analyzer Capture File | Adobe Premiere Pro CC | Adobe Systems Incorporated |
| .CFC | Adobe Systems Incorporated | Developer Files | ColdFusion Component File | Adobe Dreamweaver | Adobe Systems Incorporated |
| .CFG | Unknown Developer | Developer Files | Configuration File | Brackets | Adobe Systems Incorporated |
| .CFM | Adobe Systems Incorporated | Web Files | ColdFusion Markup File | Adobe Dreamweaver | Adobe Systems Incorporated |
| .CGM | Unknown Developer | Vector Image Files | Computer Graphics Metafile | Adobe Illustrator CC | Adobe Systems Incorporated |
| .CGR | Dassault Systèmes | CAD Files | CATIA Graphical Representation File | Adobe Acrobat DC | Adobe Systems Incorporated |
| .CHA | Snak Software | Web Files | IRC Chat Configuration File | Adobe Photoshop CC | Adobe Systems Incorporated |
| .CIN | Kodak | Raster Image Files | Kodak Cineon Bitmap File | Adobe SpeedGrade | Adobe Systems Incorporated |
| .CLR | Adobe Systems Incorporated | Uncommon Files | Animate Color Set | Adobe Animate CC 2017 | Adobe Systems Incorporated |
| .CLX | IBM | Data Files | Rational XDE | Adobe Illustrator CC | Adobe Systems Incorporated |
| .CMX | Corel | Vector Image Files | Corel Metafile Exchange Image File | Adobe Illustrator CC | Adobe Systems Incorporated |
| .COLLECTION | Adobe Systems Incorporated | Data Files | Adobe Bridge Collection File | Adobe Bridge CC | Adobe Systems Incorporated |
| .CONFIG | Unknown Developer | Developer Files | Configuration File | Brackets | Adobe Systems Incorporated |
| .CP | Apple | Developer Files | Xcode C++ Source File | Adobe Captivate | Adobe Systems Incorporated |
| .CPD | Adobe Systems Incorporated | Data Files | RoboHelp Cache Project Database | Adobe RoboHelp | Adobe Systems Incorporated |
| .CPI | Sony | Video Files | AVCHD Video Clip Information | Adobe Premiere Pro CC | Adobe Systems Incorporated |
| .CPR | Steinberg | Audio Files | Cubase Project | Adobe Captivate | Adobe Systems Incorporated |
| .CPS | Interscape | Game Files | The Powder Toy Save File | Adobe Captivate | Adobe Systems Incorporated |
| .CR2 | Canon Inc. | Camera Raw Files | Canon Digital Camera Raw Image File | Adobe Photoshop Elements | Adobe Systems Incorporated |
| .CRW | Canon Inc. | Camera Raw Files | Canon Raw CIFF Image File | Adobe Photoshop Elements | Adobe Systems Incorporated |
| .CS | Microsoft Corporation | Developer Files | C# Source Code File | Adobe Dreamweaver | Adobe Systems Incorporated |
| .CSF | Intergraph Corporation | GIS Files | GeoMedia Coordinate System File | Adobe Illustrator CC | Adobe Systems Incorporated |
| .CSH | Adobe Systems Incorporated | Uncommon Files | Photoshop Custom Shapes File | Adobe Photoshop Elements | Adobe Systems Incorporated |
| .CSN | Adobe Systems Incorporated | Developer Files | Adobe Code Snippet Document | Adobe Dreamweaver | Adobe Systems Incorporated |
| .CST | Smith Micro Software | Page Layout Files | Manga Studio Story File | Adobe Director | Adobe Systems Incorporated |
| .CT | Unknown Developer | Game Files | Cheat Engine Cheat Table | Adobe Photoshop | Adobe Systems Incorporated |
| .CTP | Cake Software Foundation | Developer Files | CakePHP Template | Adobe Dreamweaver | Adobe Systems Incorporated |
| .CXT | Omron Corporation | Developer Files | CX-Programmer Project Text File | Adobe Director | Adobe Systems Incorporated |
| .DAE | Sony | 3D Image Files | Digital Asset Exchange File | Adobe Photoshop CC | Adobe Systems Incorporated |
| .DATA | Appricon | Data Files | Analysis Studio Offline Data | Adobe Soundbooth | Adobe Systems Incorporated |
| .DBF | dBase, LLC | Database Files | Database File | JetForm FormFlow | Adobe Systems Incorporated |
| .DBM | Adobe Systems Incorporated | Web Files | ColdFusion Server File | Adobe ColdFusion Builder | Adobe Systems Incorporated |
| .DC2 | Kodak | Raster Image Files | Kodak Digital Camera RAW Image File | Adobe Photoshop | Adobe Systems Incorporated |
| .DCM | National Electrical Manufacturers Association (NEMA) | Raster Image Files | DICOM Image File Format | Adobe Photoshop | Adobe Systems Incorporated |
| .DCP | Embarcadero Technologies | Developer Files | Delphi Compiled Package | Adobe Photoshop CC | Adobe Systems Incorporated |
| .DCS | Quark Software Inc. | Vector Image Files | Desktop Color Separation File | Adobe Illustrator CC | Adobe Systems Incorporated |
| .DCX | ZSoft Corporation | Raster Image Files | Zsoft Multi-Page Paintbrush File | Adobe Photoshop | Adobe Systems Incorporated |
| .DDS | Microsoft Corporation | Raster Image Files | DirectDraw Surface | Adobe Photoshop | Adobe Systems Incorporated |
| .DEU | Adobe Systems Incorporated | Data Files | Adobe Reader German Language File | Adobe Reader | Adobe Systems Incorporated |
| .DFM | Open Source | Text Files | Pascal File | ExtendScript Toolkit (ESTK) | Adobe Systems Incorporated |
| .DHY | Adobe Systems Incorporated | Data Files | Adobe Bridge Information File | Adobe Bridge CC | Adobe Systems Incorporated |
| .DIB | The GIMP Development Team | Raster Image Files | Device Independent Bitmap File | Adobe Illustrator CC | Adobe Systems Incorporated |
| .DIM | Active@ Data Recovery Software | Backup Files | Active@ Raw Disk Image Backup File | Adobe Dimensions | Adobe Systems Incorporated |
| .DIR | Adobe Systems Incorporated | Video Files | Adobe Director Movie | Adobe Director | Adobe Systems Incorporated |
| .DLG | Crytek | Game Files | Crysis Dialogue Data File | ExtendScript Toolkit (ESTK) | Adobe Systems Incorporated |
| .DLM | AKAMAI | Uncommon Files | Akamai Download Manager File | Adobe Creative Cloud | Adobe Systems Incorporated |
| .DLV | Dassault Systèmes | CAD Files | CATIA 4 Export File | Adobe Acrobat DC | Adobe Systems Incorporated |
| .DLX | DIAL | CAD Files | DIALux Document | Adobe Premiere Pro CC | Adobe Systems Incorporated |
| .DMV | Adobe Systems Incorporated | Settings Files | Adobe Acrobat Catalog Data | Adobe Acrobat DC | Adobe Systems Incorporated |
| .DNG | Adobe Systems Incorporated | Camera Raw Files | Digital Negative Image File | Adobe Photoshop Elements | Adobe Systems Incorporated |
| .DOG | Ubisoft Blue Byte | Game Files | Dogz Dog Description File | Adobe Photoshop Elements | Adobe Systems Incorporated |
| .DPX | Kodak | Raster Image Files | Digital Picture Exchange File | Adobe SpeedGrade | Adobe Systems Incorporated |
| .DRT | Micrografx | Graphic Files | Micrografix Windows Draw Template File | Adobe Director | Adobe Systems Incorporated |
| .DRX | Adobe Systems Incorporated | Data Files | Adobe Photoshop Tutorial Data | Adobe Photoshop | Adobe Systems Incorporated |
| .DV | Roxio | Video Files | Digital Video File | Adobe Flash Professional CC | Adobe Systems Incorporated |
| .DWG | Autodesk, Inc. | CAD Files | AutoCAD Drawing Database File | Adobe Illustrator CC | Adobe Systems Incorporated |
| .DWS | Autodesk, Inc. | CAD Files | AutoCAD Drawing Standards File | Adobe Dreamweaver | Adobe Systems Incorporated |
| .DWT | Adobe Systems Incorporated | Web Files | Dreamweaver Web Page Template | Adobe Dreamweaver | Adobe Systems Incorporated |
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