The File Extensions Database

.OTM File Extension

  • Developer by: Microsoft
  • Category: Executable Files
  • Format: Text

What is an .OTM file?

.OTM is Outlook Macro File

Macro created with Microsoft Outlook, an email application; contains scripted functions written in Microsoft's VBA language; often used for automating repetitive tasks, such as scanning email messages or collecting file attachments.

By default, the Windows Vista and Windows 7 versions of Outlook store macros in the file VbaProject.otm. Outlook saves this file in the following user directory: \Roaming\Microsoft\Outlook.

NOTE: You must enable macros in the Outlook security settings in order to run them.

Programs that open Outlook Macro File
Microsoft Outlook 2016
Microsoft Word 2016
File Type 2 Origin Matrix Template
Developer by: OriginLab Category: Settings Files

An OTM file is a matrix template created by Origin, a data analysis and graphing application used by various scientists and engineers. It contains settings for a matrix, such as style and formatting and the number of rows and columns. OTM files are used to create .OGM matrices.

You can only open OTM files with Origin, which can be used to create, open, and edit OTM files. The program is only available for Windows.

To open an OTM file in Origin, select File → Open..., select the "Origin Template .otm" file type, navigate to the OTM file location, and click Open.

NOTE: The release of Origin 2018 included an updated unicode format for saving workbook templates (.OTMU), which features performance advantages over the older, non-unicode OTM file format.

Programs that open Origin Matrix Template
OriginLab Origin

How to solve problems with OTM files

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