The File Extensions Database


.D2 File Extension

  • Developer by: Progress Software Corporation
  • Category: Database Files

What is an .D2 file?

.D2 is Progress database

The d2 file extension is associated with software products developed by Progress, like Progress ObjectStore, OpenEdge, Corticon, Apama etc.

The d2 file stores database with data used by these applications.


How to open:

Use Progress ObjectStore to work with *.d2 files.

How to convert:

Possibly can be converted like any other database format.

How to solve problems with D2 files

  • Associate the D2 file extension with the correct application. On :
    Windows: Right click on any D2 file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.D2 files". Mac: Right click (or Ctrl-click) the D2 file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .D2 is Progress database. Because only the current version supports the latest D2 file format. Search, therefore, e.g. on the Progress Software Corporation manufacturer website after an available .D2 is Progress database update.
  • To make sure that your D2 file is not corrupted or virus-infected, get the file again and scan it with antivirus software.