ONE File

Did your computer fail to open an ONE file? We explain what they are used for and recommend software that we know can open or otherwise handle your .ONE files.

What is an ONE file?

An .ONE file is a Microsoft OneNote Note file. 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.

We have not yet verified any programs for Windows that work with this specific file format. If you know one, please use the 'Suggest a program' link below. Thanks!

What else are .ONE files used for?

While Microsoft OneNote Note is a popular type of ONE-file, we know of 3 different uses of the .ONE extension.

The ONE file extension indicates to your device which app can open the file. However, different apps may use the same file extension for different types of data. So an ONE opener may not be able to open all kinds of ONE files. In this case, look through all formats to make sure you find the best suited ONE viewer.

SEMONE compressed archive

Through our analysis of ONE files, we know that one use of the format is SEMONE compressed archive. We have not yet described in detail what these files contain and what they are used for, but our team is working tiredlessly through thousands of file formats. We'd love hearing from you if you have information about the format.

We have not yet verified any programs for Windows that work with this specific file format. If you know one, please use the 'Suggest a program' link below. Thanks!

Sequencer One song

Through our analysis of ONE files, we know that one use of the format is Sequencer One song. We have not yet described in detail what these files contain and what they are used for, but our team is working tiredlessly through thousands of file formats. We'd love hearing from you if you have information about the format.

We have not yet verified any programs for Windows that work with this specific file format. If you know one, please use the 'Suggest a program' link below. Thanks!

Various ONE file openers, viewers, etc.

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
HAANSOFT HWPHAANSOFT HWPUser submitted
Any Video Converter ProfessionalAny Video Converter ProfessionalUser submitted
Microsoft Office Mondo - EnglishMicrosoft Office Mondo - EnglishUser submitted
V-ToolsV-ToolsUser submitted
CLSCLSUser submitted
We have not verified any software that we know for certain will work with ONE-files on Mac. If you know one, please use the 'Suggest a program' link below and tell us about it!
We have not verified any web services that we know for certain will work with ONE-files. If you know one, please use the 'Suggest a program' link below and tell us about it!