.1SP File

.1sp is Microsoft OneNote Mobile document

Key Features: .1SP File Extension

What's on this Page

The 1sp file extension is mainly associated with the Microsoft OneNote Mobile. and used for the default document format of the program.

OneNote Mobile document file is not compatible with Microsoft OneNote for desktop computers.

It is likely that you can work with these *.1sp only using the mobile version of OneNote.

If any conversion or export is possible, it would be done in OneNote Mobile.

Associate the 1SP file extension with the correct application. On :
Windows: Right click on any 1SP file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.1SP files". Mac: Right click (or Ctrl-click) the 1SP 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 .1SP is Microsoft OneNote Mobile document. Because only the current version supports the latest 1SP file format. Search, therefore, e.g. on the Microsoft Corporation manufacturer website after an available .1SP is Microsoft OneNote Mobile document update.
To make sure that your 1SP file is not corrupted or virus-infected, get the file again and scan it with antivirus software.