.COPF File Extension Copy Operation File Developer Vovsoft Popularity Submit Rating Average rating 3.4 / 5. Vote count: 9 Category Text Files Format .COPF Cross Platform Update Soon What is an COPF file? More Information. Origin Of This File. File Structure Technical Specification. How to Convert the File? Advantages And Disadvantages. How to Open COPF? Open In Windows Open In Linux Open In MAC Open In Android Open In IOS Open in Others Verified by allfileinfo.com