| .csv |
Comma Separated Values File |
| .cpp |
C++ Source Code File |
| .c |
C/C++ Source Code File |
| .cfm |
ColdFusion Markup File |
| .cfg |
Celestia Configuration File |
| .cue |
Cue Sheet File |
| .cs |
C# Source Code File |
| .csr |
Certificate Signing Request File |
| .crdownload |
Chrome Partially Downloaded File |
| .cgm |
Computer Graphics Metafile |
| .cmd |
Windows Command File |
| .crd |
Guitar Tabs |
| .conf |
Unix Configuration File |
| .csh |
Photoshop Custom Shapes File |
| .cva |
HP System Software Manager Information File |
| .cls |
LaTeX Document Class File |
| .cub |
Analysis Services Cube File |
| .celx |
Celestia Script |
| .cdf |
Computable Document Format File |
| .cnf |
MySQL Configuration File |
| .cshtml |
ASP.NET Razor Web Page |
| .cgfx |
CgFX Shader File |
| .cg |
Cg Program |
| .clp |
CrazyTalk Clip File |