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What are ONE files and how to open them

Are you having problems opening an ONE file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your ONE files.

What is an ONE file?

ONE files have multiple uses, and Microsoft OneNote Note is one of them. Read more about the other uses further down the page.

Microsoft OneNote Note

The files that contain the .one file extension are most commonly created by the Microsoft OneNote computer software application.

OneNote allows users to take free-form electronic notes on their computer by using typed or handwritten input. These notes are then saved to the user's hard drive with the .one file extension. The OneNote application also allows for audio recordings and advanced searching options. Files with the .one extension usually contains text notes that have been saved within the application. Still, they may also include pasted clipboard contents and audio or video clips that have been incorporated into a OneNote file.

How to open ONE files

Important: Different programs may use files with the ONE file extension for different purposes, so unless you are sure which format your ONE file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested six different ONE openers which you will find listed below.

Last updated: February 24, 2023

All known file formats using extension .ONE

While Microsoft OneNote Note is a popular type of ONE-file, we know of 3 different uses of the .ONE file extension. Different software may use files with the same extension for different types of data.

SEMONE Compressed Archive

We know that one ONE format is SEMONE Compressed Archive. We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

Sequencer One Song

We know that one ONE format is Sequencer One Song. We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

Various apps that use files with this extension

These apps are known to open certain types of ONE files. Remember, different programs may use ONE files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Microsoft OneNoteMicrosoft OneNoteUser submitted
Microsoft OfficeMicrosoft OfficeUser submitted
Adobe AcrobatAdobe AcrobatUser submitted
Hancom OfficeHancom OfficeUser submitted
V-ToolsV-ToolsUser submitted
CLSCLSUser submitted

Help us help others

File.org helps thousands of users every day, and we would love to hear from you if you have additional information about ONE file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.