| .cfx |
Flow-Cal Data File |
| .crypt9 |
WhatsApp Encrypted Database File |
| .collab |
Blackboard Collaborate Session File |
| .cerber |
Cerber Ransomware Encrypted File |
| .cerber2 |
Cerber2 Ransomware Encrypted File |
| .cell |
Thinkfree Office NEO Cell Workbook |
| .cid |
Navigator Chart Image Description File |
| .cfb |
Compound Binary File |
| .cpdx |
Adobe Captivate Storyboard Project |
| .cr3 |
Canon Raw 3 Image File |
| .crw |
Canon Raw CIFF Image File |
| .cals |
CALS Raster Graphic File |
| .cag |
ClipArt Gallery Package |
| .c02 |
WinAce Split Archive Part 1 File |
| .ccx |
Click & Create Extension |
| .cox |
Click & Create Extension |
| .cvs |
Canvas 3 Drawing File |
| .cnv |
Canvas 6-8 Drawing File |
| .ccr |
ASTM Continuity of Care Record |
| .cmm |
Corel Multimedia Manager Album |
| .ceb |
Apabi eBook File |
| .cwf |
CorelDRAW Workspace File |
| .col |
Capture One Session File |
| .cwz |
Circuit Wizard File |