The File Extensions Database

.ACCDR File Extension

  • Developer by: Microsoft
  • Category: Database Files
  • Format: Binary

What is an .ACCDR file?

.ACCDR is Access Runtime Application

"Locked-down" database file created by the Microsoft Access relational database software; stores an .ACCDB database, except with the extension renamed to ".accdr;" allows the database to be opened and run in a read-only mode so that no changes are made to the database.

If you want to run an ACCDB database in read-only mode, rename the file extension to ".accdr" and then open it. To restore the database to its original read-write format, rename the extension back to ".accdb."

Programs that open Access Runtime Application
Microsoft Access 2016

How to solve problems with ACCDR files

  • Associate the ACCDR file extension with the correct application. On :
    Windows: Right click on any ACCDR file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.ACCDR files". Mac: Right click (or Ctrl-click) the ACCDR 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 .ACCDR is Access Runtime Application. Because only the current version supports the latest ACCDR file format. Search, therefore, e.g. on the Microsoft manufacturer website after an available .ACCDR is Access Runtime Application update.
  • To make sure that your ACCDR file is not corrupted or virus-infected, get the file again and scan it with antivirus software.