The File Extensions Database


.3MM File Extension

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

What is an .3MM file?

.3MM is 3D Movie Maker Movie Project

Movie or animation created with 3D Movie Maker (3DMM) for Windows; includes a 3D scene with three-dimensional characters and objects; may also contain music, sound effects, speech, and special effects.

3MM files are also created by Microsoft's Nickelodeon 3D Movie Maker, which is based on the original 3DMM program.

NOTE: The 3D Movie Maker software has been discontinued.

How to solve problems with 3MM files

  • Associate the 3MM file extension with the correct application. On :
    Windows: Right click on any 3MM file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.3MM files". Mac: Right click (or Ctrl-click) the 3MM 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 .3MM is 3D Movie Maker Movie Project. Because only the current version supports the latest 3MM file format. Search, therefore, e.g. on the Microsoft manufacturer website after an available .3MM is 3D Movie Maker Movie Project update.
  • To make sure that your 3MM file is not corrupted or virus-infected, get the file again and scan it with antivirus software.