File Extension DDF

File type: ACDSee Database File

About the DDF file type:

If Windows cannot find the appropriate program associated with .DDF files, then your registry may have errors. Check your Windows registry for errors (includes file association errors).

The .DDF file extension identifies an ACDSee database files. ACDSee is an image organization application that is distributed as shareware by ACD Systems. The .DDF itself logs your activity.

Additional Information:
The .DDF extension also identifies Btrieve and Xtrieve data files, Diamond Directive files, Doom and Grand Theft Auto III files, and ACT! Database files.