All about ONEPKG Files

The ONEPKG file type is primarily associated with OneNote.

ONEPKGFile Extension ONEPKG
File extension: ONEPKG
File type:  data backup file

What is an ONEPKG file

ONEPKG files mostly belong to OneNote by Microsoft Corporation. Microsoft Office OneNote application creates ONEPKG extension files. ONEPKG file is a a type of archive of document. Cooperating users can exchange information using ONEPKG file. ONEPKG archives are generated by archived data which is imported or exported from one device to another. ONEPKG file can be open in 7-zip tool just by changing extension to ZIP. User can also backup documents in ONEPKG file.

How can I open an ONEPKG file?

You need a suitable software like OneNote to open an ONEPKG file. You need a suitable software like OneNote from Microsoft Corporation to open an ONEPKG file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your ONEPKG file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a ONEPKG file directly in the browser:. Just drag the file onto this browser window and drop it.

Online ONEPKG Text Viewer

Choose your .onepkg file to analyze

Read our privacy guarantee in Filext’s terms and privacy policy

Please allow ads on our site

This helps us keep our servers running. Then re-upload your file to view it.

Click here to see how to disable the ad blocker for filext.com

.ONEPKG File Won't Open? Here is What You Can Do

Because .ONEPKG files can come from different programs and workflows, they aren't universally openable.

  1. Identify the Source: You might receive this from a colleague sharing project notes or as an automated system backup, strongly suggesting a Microsoft OneNote Package.
  2. Check the Header: Open the file in a hex viewer to inspect its first bytes.
    • MSCF: Indicates a Microsoft Cabinet archive, confirming a standard OneNote package.
    • PK: Suggests a standard ZIP-based archive format.
  3. Use the Original Software: The original program is usually required to open it properly; try Microsoft OneNote, an archive tool like 7-Zip, or ask the sender if you remain uncertain.
  4. Use this Webpage: Drag and drop your file onto this page to detect its format, extract readable metadata, and preview the contents.

Technical Data for ONEPKG File Extension

File classification:
Backup
Related files:

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and file extension information submitted by users.

ProgramID: OneNote.Archive
EXEFile: %ProgramFiles%\Microsoft Office\Office12\ONENOTE.EXE

ProgramID: OneNote.Package
EXEFile: %ProgramFiles%\Microsoft Office\Office12\ONENOTE.EXE


an onepkg data backup file is a special file format by Microsoft Corporation and should only be edited and saved with the appropriate software.

How to solve problems with ONEPKG files

  • Associate the ONEPKG file extension with the correct application.
  • Update your software that should actually open data backup files. Because only the current version supports the latest ONEPKG file format. Search, therefore, e.g. on the Microsoft Corporation manufacturer website after an available OneNote update.
  • To make sure that your ONEPKG file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
  • Click here to open your .ONEPKG file online - secure, fast, and no downloads needed.
Drop here
View another file
ONEPKG file viewer ONEPKG file description