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.ONETOC File Extension

File TypeMicrosoft OneNote Table of Contents File

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What is an ONETOC 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.

More Information

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.

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Programs that open ONETOC files

Updated 5/24/2017

About ONETOC Files

Our goal is to help you understand what a file with a *.onetoc suffix is and how to open it.

The Microsoft OneNote Table of Contents file type, file format description, and Windows programs listed on this page have been individually researched and verified by the FileInfo team. We strive for 100% accuracy and only publish information about file formats that we have tested and validated.

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