| cmu | CMU Window Manager Bitmap |
| cmyk | Raw CMYK Bitmap |
| cop | Capture One Preview Image |
| cot | Intergraph Format Bitmap Image |
| cp8 | CP8 256 Grayscale Image |
| cpa | Prism Image |
| cpc | Cartesian Document Image |
| cpc | Amstrad CPC Captured Screen |
| cpi | Calamus Document |
| cps | Colored PostScript |
| cpt | Corel Photo-Paint Image |
| cpx | CryptaPix Encrypted Image |
| cpx | CinePaint XML-tagged Image |
| cr2 | Canon Raw 2 Image |
| crg | Calamus Document |
| cri | GE Medical CRI Image |
| cri | Crystal Reports Image |
| crw | Canon Raw Image |
| cs1 | Sinar CaptureShop RAW Image |
| cs16 | Sinar CaptureShop RAW Image |
| cs4 | Sinar CaptureShop RAW Image |
| csh | Adobe Photoshop Custom Shapes |
| csm | Sinar CaptureShop RAW Image |
| ct | Silicon Graphics Iris Cliptexture |
| ct | Scitex Continuous Tone |
| ct | TIFF Contone File |
| ctf | Optigraphics Image |
| cubi | Cubicomp PictureMaker Bitmap Image |
| cur | Windows Custom Cursor |
| cursor | Windows Custom Cursor |
| cut | Dr. Halo Bitmap Image |
| cvg | Calamus Vector Graphic |
| cvi | CassiniVision Map Image |
| cvp | WinFax Cover Page |
| cvx | ACDSee Canvas Image |