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


Have you came across a file with the .onepkg extension and you don’t know what it is? You most likely know what the file is, but you might be unsure on how to open it. That’s why you are here! We have made this guide for you to learn more about the .onepkg file extension and how to open it.

What is a .ONEPKG file?

The .ONEPKG file extension is Microsoft OneNote Package File. It was developed by Microsoft. The file is a backup file.

What to know

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

How to open a .ONEPKG file?

Below you can find an easy to understand, step-by-step guide to open the .ONEPKG file on your operating system/device.

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

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

1. The first step is to download the Microsoft OneNote 365 software. This software will be used for opening the file. Other software that can be used in opening this file is: Microsoft OneNote 365.

Step 2

Step 2: Locating your .ONEPKG 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 OneNote 365 software you have downloaded. Choose your software and click on “OK”. Congratulations! You have opened your file on Windows.

Still cannot open the .ONEPKG file?

If you cannot open the .ONEPKG file, it is entirely possible that you are trying to open the wrong file. There are many similar file extensions that look like the .ONEPKG file.onetoc – Microsoft, .onetoc2 – Microsoft, .ont – theWord Bible Software, .ontx – theWord Bible Software, .oo3 – The Omni Group. 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 .ONEPKG file with the Microsoft OneNote 365 program on Windows.