File Extension Library


.ONETOC File Extension

  • Developer by: Microsoft
  • Category: Settings Files
  • Format: Binary

What are .ONETOC files and how to open them?

Can't open .ONETOC file? Are you wondering what it contains? On our site we will explain to you what this file is, what it is used for and what software opens the .ONETOC file.

What is a .ONETOC file extension?

.ONETOC file extension is created by Microsoft. .ONETOC has been classified as Settings Files. The format of .ONETOC file is Binary.

.ONETOC is Microsoft OneNote Table of Contents File

A ONETOC file is an index file created by Microsoft OneNote 2003, a program used to take notes and journal. It contains information about the ordering of different note-taking sections. ONETOC files are used for organizing the collection of notes in the notebook.

ONETOC files are created by OneNote when you create a OneNote notebook by selecting File → New in OneNote. ONETOC files are not meant to be manually opened. It is instead referenced by OneNote when opening a notebook. If you delete the ONETOC file, OneNote will display the notebook sections in alphabetical order, which you can manually reorder.

NOTE: ONETOC files are used by Microsoft OneNote 2003. The file was replaced by .ONETOC2 with the release of OneNote 2007.

List of all softwares that can open the Microsoft OneNote Table of Contents File
Windows
Microsoft OneNote 2016

How to fix problems with .ONETOC files

  1. You need to update the application that you normally use to open .ONETOC files. Only the latest version of the software supports the current .ONETOC file format
  2. You need to check the .ONETOC file for viruses. To do this, you need to scan it with a popular antivirus (Norton, Nod32, Kaspersky, Dr.Web, etc.)