Open 1sp file
Did your computer fail to open 1sp file? We explain what 1sp files are and recommend software that we know can open your 1sp files.
What is 1sp file?
Files with 1sp file extension are documents created in OneNote Mobile app. Unfortunately, this document is not compatible with classic Windows version.
1sp file description
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.