What is a .OTM File And How To Open It – Microsoft (Guide)

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Have you downloaded a file with .otm extension, but you are not sure what it is? Perhaps you know what the file is, but you simply don’t know how to open it. Thanks to this easy guide you will be able to find out what .otm file extension is, how to open it and how to work with it.

What is a .OTM file?

The .OTM file extension is Outlook Macro File. It was developed by Microsoft. The format of this file is text, and it is a executable file.

What to know

There is currently 1 software that can open the .otm file on 1 platform.

How to open a .OTM file?

Below we have written a comprehensive guide on how to open the .OTM file on various operating systems.

How to open a .OTM file on Windows (7, 8, 10)

The .otm file can be opened in 4 steps on Windows.

1. The first step is to download the Microsoft Outlook 365 software. You will be using this software in order to open the file.

Step 2

Step 2: Locating your .OTM file

2. In the second step you need to locate the downloaded file. The file can be usually found in your /download/ folder if you don’t remember where you have downloaded it to.

Step 3

Step 3: Choose “Open with”

3. In the third step, after locating your file, right click on it and click “Open with”.

Step 4

Step 4: Choose the software and click ok

4. After choosing the “Open with” option, you will have an option to choose the Microsoft Outlook 365 software you have downloaded. Click on the software and click “OK”. That’s all, now you have opened your file on Windows.

Still cannot open the .OTM file?

If you cannot open the .OTM file, it is entirely possible that you are trying to open the wrong file. There are many similar file extensions that look like the .OTM file.otm – OriginLab. You might be trying to open the wrong file, please recheck if you are trying to open the right file extension again.


In this article you have learned how to open the .OTM file with the Microsoft Outlook 365 program on Windows.