What is the ONETMP File Extension?

Author:   |   Last Updated: May 29, 2023

Microsoft Silver

ONETMP File Summary

Most ONETMP files can be viewed with zero known software applications, typically Microsoft OneNote developed by Microsoft Corporation. It's main file type association is the Microsoft OneNote  format. Generally, these files are considered .

Both desktop and mobile devices enable you to view and (sometimes) edit these files, depending on the software used. ONETMP files have a "Medium" Popularity Rating; this means that they are occasionally present on most devices.

If you are having problems opening ONETMP files, or would simply like to learn more about the software programs and developers that are associated with them, please see the complete information contained below.

Medium
File Type Popularity
11690
File Rank

/ 11690

Active

File Status

29

May

2023

Page Last Updated

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Types of ONETMP Files


Primary ONETMP File Association

.ONETMP
File Format:.onetmp
File Type:Microsoft OneNote 

Created by: Microsoft Corporation
File Category:Uncommon Files
Registry Key: HKEY_CLASSES_ROOT\.onetmp

Software Programs That Open The Microsoft OneNote :


Microsoft OneNote by Microsoft Corporation

Windows
Windows Phone
Mac
iOS
Android

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ONETMP File Popularity


Top Web Browsers

Chrome (58.80%)
Firefox (11.05%)
Internet Explorer (9.04%)
Edge (8.46%)
Safari (3.87%)


Troubleshooting Problems Opening ONETMP Files


Common Problems Opening ONETMP Files

Microsoft OneNote is Not Installed

When you double-click your ONETMP file, you may see a dialog box from your operating system stating that it "Cannot Open This File Type". If this is the case, it's usually due to the fact that you do not have Microsoft OneNote for %%os%% installed on your computer. Because your operating system doesn't know what to do with this file, you won't be able to open it by double-clicking.


Tip: If you know of another program that can open your ONETMP file, you can try opening it by selecting the application from the programs listed.


Wrong Version of Microsoft OneNote is Installed

In some cases, you might have a newer (or older) version of a Microsoft OneNote  file that is unsupported by your installed application version. If you do not have the proper version Microsoft OneNote (or any of the other programs listed above), you may need to try downloading a different version of it, or one of the other software applications listed above. This problem is most common when you have an older version of the software application, and your file was created by a newer version that it cannot recognize.


Tip: Sometimes you can get a clue about the version of ONETMP file you have by right clicking on the file, then clicking on "Properties" (Windows) or "Get Info" (Mac OSX).


Summary: In either case, the majority of problems opening ONETMP files are related to not having the correct software application installed on your computer.


Other Causes of ONETMP File Opening Problems

Although you might already have Microsoft OneNote or another ONETMP-associated software installed on your computer, you can still encounter problems opening Microsoft OneNote  files. If you are still having problems opening ONETMP files, there may be other issues that are preventing you from opening these files. These other problems include (listed in order from most to least common):

  • Invalid ONETMP file references in the Windows Registry (the "phonebook" of the Windows Operating System)
  • Accidental deletion of the description of the ONETMP file in the Windows registry
  • Incomplete or bad installation of a software application associated with the ONETMP format
  • Your ONETMP file is corrupted (issues with your Microsoft OneNote  file itself)
  • Your ONETMP is infected with malware
  • Device drivers of the hardware associated with your ONETMP file are corrupt or out-of-date
  • Your computer does not have the adequate system resources to open the Microsoft OneNote  format

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