60 File Extensions starting with C
| .C | C Source File |
| .C2D | C2D Disk Image |
| .C4 | Edmics Image |
| .CAB | Cabinet Compressed Archive |
| .CAL | CALS Raster Image |
| .CALS | CALS Raster Image |
| .CAM | Casio QV-10/100 Camera Image |
| .CAN | Canon Navigator Fax Image |
| .CAR | NeoBook Cartoon Image |
| .CAT | Photomatrix Image |
| .CBM | Fuzzy bitmap Image |
| .CCD | CCD Disk Image |
| .CD | CD Disk Image |
| .CDI | CD Image File |
| .CDR | Raw CD Audio File |
| .CDR | Corel Draw Bitmap (preview) Image |
| .CDU | CDU Paint Image |
| .CE | Computer Eyes, Digital Vision Image |
| .CE1 | ComputerEyes Raw Image |
| .CE2 | ComputerEyes Raw Image |
| .CEL | Kiss Cel Image |
| .CFT | Optigraphics Image |
| .CGI | Perl Source File |
| .CGM | Computer Graphics Metafile |
| .CHM | Compiled Help File |
| .CIF | CIF Disk Image |
| .CIN | Kodak Cineon Image |
| .CIT | Intergraph Format Image |
| .CKZ | CKZ Checksum File |
| .CLO | Cloe Ray-Tracer Image |
| .CLOE | Cloe Ray-Tracer Image |
| .CLP | Windows Clipboard Image |
| .CLP | PC Paint / Pictor Page Image |
| .CLP | GoDot Image |
| .CMP | Discorp CMP Image |
| .CMT | Chinon ES-1000 digital camera Image |
| .CMU | CMU Window Manager Image |
| .CMX | Corel Metafile Exchange (preview) Image |
| .CODE | eXtensible Stylesheet Language Transformation File |
| .CONFIG | Configuration File |
| .CP8 | CP8 256 Gray Scale Image |
| .CPI | Calamus Image |
| .CPIO | CPIO Compressed Archive |
| .CPP | C++ Source File |
| .CPT | CorelDraw Photopaint Image |
| .CR2 | Raw Image File |
| .CRC | Cyclic Redundancy Check Checksum File |
| .CRG | Calamus Image |
| .CRW | Raw Image File |
| .CS | C# Source File |
| .CSPROJ | C# Project File |
| .CSS | Cascading Style Sheets Source File |
| .CSV | Comma Separated Value Database |
| .CT | Iris CT Image |
| .CUE | Cue Sheet |
| .CUR | Mouse Cursor Image |
| .CURSOR | Sun Icon/Cursor |
| .CUT | Dr Halo Image |
| .CVP | Portrait Image |
| .CXX | C++ Source File |