Having problems opening an ONE file?

We have programs that can open or convert your ONE files.

Opening ONE files

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

What is an ONE 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 contain text notes that have been saved within the application, but they may also contain pasted clipboard contents and audio or video clips that have been incorporated into a OneNote file.

Try a universal file viewer

Try a universal file viewer like Free File Viewer. It can open over 200 different types of files - and most likely yours too. Download Free File Viewer here.

About File Extension ONE

File.org aims to be the go-to resource for file type- and related software information. We spend countless hours researching various file formats and software that can open, convert, create or otherwise work with those files.

If you have additional information about the ONE file format or software that uses files with the ONE suffix, please do get in touch - we would love hearing from you.