| .C4 | Northrop Grumman Corporation | Arquivos de imagem Raster | JEDMICS Image File | Trix DrawingCenter | Trix Systems |
| .CA1 | Piotr Fusik | Arquivos de imagem Raster | CrackArt Picture Image | Recoil | Piotr Fusik |
| .CA3 | Casio Computer Co., Ltd. | Arquivos de imagem Raster | Casio WK-1800 Save All Data | WK-1800 | Casio Computer Co., Ltd. |
| .CAL | Newera Software Technology, Inc. | Arquivos de imagem Raster | CALS Raster File | Adobe Photoshop | Adobe Systems Incorporated |
| .CALS | Newera Software Technology, Inc. | Arquivos de imagem Raster | CALS Raster File | Adobe Photoshop | Adobe Systems Incorporated |
| .CAM | Ucamco | Arquivos de imagem Raster | Gerber CAM Job File | CadSoft EAGLE | Autodesk, Inc. |
| .CAN | Canon Inc. | Arquivos de imagem Raster | Canon Navigator Fax File | Canon MP Navigator | Canon Inc. |
| .CARD | GameHouse | Arquivos de imagem Raster | Funkiball Adventure Game File | Funkiball Adventure | GameHouse |
| .CCH | Microsoft Corporation | Arquivos de imagem Raster | .NET Security Resolution Cache File | Microsoft .NET Framework | Microsoft Corporation |
| .CCI | Piotr Fusik | Arquivos de imagem Raster | Champions' Interlace Compressed Picture Image | Recoil | Piotr Fusik |
| .CCRF | Calcomp | Arquivos de imagem Raster | Calcomp Raster Bitmap Image File | ArcView | ESRI |
| .CDC | Autodesk, Inc. | Arquivos de imagem Raster | AutoCAD DesignCenter Preview Cache File | Autodesk AutoCAD | Autodesk, Inc. |
| .CDG | Open Source | Arquivos de imagem Raster | Compact Disc Plus Graphics Image | Nullsoft Winamp | Nullsoft |
| .CE | Digital Vision | Arquivos de imagem Raster | ComputerEyes Image | XnView MP | XnSoft |
| .CHART | Interscape | Arquivos de imagem Raster | Feedback Chart File | Microsoft Notepad | Microsoft Corporation |
| .CHE | Procedimientos-Uno, S.L. | Arquivos de imagem Raster | CHwinEHE Project Files | CHwinEHE | Procedimientos-Uno, S.L. |
| .CID | Omar F. Reis | Arquivos de imagem Raster | Navigator Software Chart Image Description File | Navigator | Omar F. Reis |
| .CIN | Kodak | Arquivos de imagem Raster | Kodak Cineon Bitmap File | Adobe SpeedGrade | Adobe Systems Incorporated |
| .CIT | Intergraph Corporation | Arquivos de imagem Raster | Intergraph Bitmap Image File | Intergraph SG&I software | Intergraph Corporation |
| .CLIP | CELSYS | Arquivos de imagem Raster | Clip Studio Format File | CELSYS Clip Studio Paint Pro | CELSYS |
| .CMP | Microsoft Corporation | Arquivos de imagem Raster | Windows Connection Manager Profile | Microsoft Windows Server 2016 | Microsoft Corporation |
| .CMR | CMA Coach | Arquivos de imagem Raster | Coach Results File | CMA Coach | CMA Coach |
| .CPC | Cartesian Products, Inc. | Arquivos de imagem Raster | CPC Compressed Image File | Internet Explorer | Microsoft Corporation |
| .CPD | Adobe Systems Incorporated | Arquivos de imagem Raster | RoboHelp Cache Project Database | Adobe RoboHelp | Adobe Systems Incorporated |
| .CPS | Interscape | Arquivos de imagem Raster | The Powder Toy Save File | The Powder Toy | Interscape |
| .CPT | Corel | Arquivos de imagem Raster | Corel Photo-Paint Image | Corel Presentations X8 | Corel |
| .CPX | Oracle Corporation | Arquivos de imagem Raster | Oracle ADF Binding Context File | Oracle JDeveloper | Oracle Corporation |
| .CSF | Intergraph Corporation | Arquivos de imagem Raster | GeoMedia Coordinate System File | Intergraph GeoMedia | Hexagon Geospatial |
| .CT | Unknown Developer | Arquivos de imagem Raster | Cheat Engine Cheat Table | Cheat Engine | Open Source |
| .CUT | Various Developers | Arquivos de imagem Raster | Dr. Halo Bitmap Image File | Lemkesoft GraphicConverter | Lemkesoft |
| .CVP | Symantec Corporation | Arquivos de imagem Raster | WinFax Cover Page | WinFax | Delrina |
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