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1SP file - How do I open a .1sp file?

The table below provides useful information about the .1sp file extension. It answers questions such as:

We hope you find this page helpful and a valuable resource!

1 extension(s) and 0 alias(es) found in database

✅ Microsoft OneNote 2010 Mobile Document

Microsoft OneNote 2010 Mobile Document .1sp file icon
The 1SP file is a Microsoft OneNote 2010 Mobile Document. OneNote Mobile is a Windows Mobile program that is intended to provide a convenient way to take notes on a Windows Mobile smartphone.
The 1SP format description is not yet available
Category: Document files
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
1SP aliases:
1SP related links:
1SP related extensions:

Other types of files may also use the .1sp file extension.

🚫 The .1sp file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

lsp, qsp, s1p, sp, wsp

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

EEsof Touchstone File
SignPlot Document
Adobe ImageReady Application Workspace
Lisp Source Code
QSetup Project

🔴 Can't open a .1sp file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows cannot open this file:


To open this file, Windows needs to know what program you want to use to open it...

If you don't know how to set the .1sp file association, check the FAQ.

🔴 Can I change the extension of files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.

If you have helpful information about the .1sp file extension, write to us!

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