What is an ONEPKG file & how do I open an ONEPKG file (Microsoft OneNote Package)?

.ONEPKG (Microsoft OneNote Package) - File Extension

Developer: Microsoft

What is an ONEPKG File?

The “.ONEPKG” file extension is a container format utilized by Microsoft OneNote, a popular note-taking application.

It serves as an archive for multiple OneNote documents, each stored as a “.ONE” file.

Essentially, a ONEPKG file allows users to efficiently organize, move, or back up several notebooks simultaneously.

How to Open an ONEPKG File

To open an ONEPKG file, users can utilize Microsoft OneNote, the primary software designed for working with OneNote files.

Upon launching OneNote, users can simply navigate to the “File” menu, select “Open,” and then choose the desired ONEPKG file from their directory.

Alternatively, users can double-click the ONEPKG file, which should automatically open it in OneNote if the software is installed correctly.

How to Convert an ONEPKG File

Converting files to the ONEPKG format typically involves using Microsoft OneNote to package multiple notebooks into a single archive.

Conversely, extracting individual “.ONE” files from an ONEPKG archive can be done by simply opening the ONEPKG file in OneNote and then saving the notebooks individually.

However, the ONEPKG format itself is not typically converted to other formats, as its primary purpose is to bundle OneNote documents together for organizational or backup purposes.

Security Considerations: Are “.ONEPKG” Files Safe?

ONEPKG files themselves are not inherently unsafe. However, like any digital file, they can potentially carry risks if obtained from untrustworthy sources or if they contain malicious content.

Users should exercise caution when downloading ONEPKG files from the internet and ensure they originate from reputable sources.

As with any file, it’s advisable to use reliable antivirus software to scan for potential threats before opening.

Format Details for ONEPKG Files

The ONEPKG format is essentially a compressed archive that contains multiple “.ONE” files. It’s akin to a ZIP file but specific to Microsoft OneNote.

Each “.ONE” file within the ONEPKG archive represents an individual notebook in the OneNote application.

The format likely incorporates standard compression techniques to reduce file size and optimize storage efficiency.

Uses and Applications of ONEPKG Files

ONEPKG files are primarily used for organizing and managing multiple OneNote notebooks.

They are especially useful for users who work with numerous notebooks simultaneously or need to back up their work efficiently.

By consolidating multiple notebooks into a single ONEPKG file, users can streamline file management tasks and simplify the process of transferring or sharing their notes.

Associated Software Programs

The primary software program associated with ONEPKG files is Microsoft OneNote.

OneNote is available as part of the Microsoft Office suite and is widely used for note-taking, information gathering, and collaboration.

Also, any software that supports the “.ONE” file format can theoretically work with ONEPKG files, as they essentially contain collections of “.ONE” files.

  • Microsoft OneNote: The official software for creating, editing, and viewing OneNote notebooks, including ONEPKG files.
  • Alternative OneNote Readers: Some third-party applications may offer limited support for viewing or editing OneNote notebooks, but compatibility may vary.

Advantages and Disadvantages of ONEPKG Files


  • Efficient Organization: ONEPKG files allow users to consolidate multiple OneNote notebooks into a single, easily manageable archive.
  • Convenient Backup: By storing multiple notebooks in a single file, users can simplify the backup process and ensure all their notes are securely preserved.
  • Streamlined Sharing: Sharing multiple notebooks with others becomes more straightforward when packaged into a single ONEPKG file.


  • Limited Compatibility: While Microsoft OneNote fully supports ONEPKG files, compatibility with other software may be limited.
  • Potential Data Loss: If an ONEPKG file becomes corrupted, there is a risk of losing access to multiple notebooks simultaneously.
  • Increased File Size: Depending on the number and size of the included notebooks, ONEPKG files may become relatively large, consuming more storage space.


In comparison to other file extensions commonly used for archiving or organizing digital content, such as ZIP or RAR files, ONEPKG files are tailored specifically for Microsoft OneNote.

While ZIP and RAR files offer more general-purpose compression and archiving capabilities, ONEPKG files are optimized for managing collections of OneNote notebooks.

Plus, unlike ZIP or RAR files, which require extraction to access individual files, ONEPKG files can be directly opened and edited within Microsoft OneNote.

Troubleshooting ONEPKG Files

If encountering issues with ONEPKG files, users can try the following troubleshooting steps:

  1. Ensure Proper Installation: Make sure Microsoft OneNote is correctly installed and updated to the latest version.
  2. Check File Integrity: If encountering errors when opening an ONEPKG file, try verifying its integrity by opening it on another device or comparing it against a backup.
  3. Scan for Viruses: If suspicious of the ONEPKG file’s origin, scan it for viruses or malware using reliable antivirus software.
  4. Attempt File Repair: Some third-party software tools may offer functionality to repair corrupted ONEPKG files, although success rates may vary.

History of the ONEPKG File Extension

The exact origins of the ONEPKG file extension are tied to the development of Microsoft OneNote, which was first introduced in 2003 as part of the Microsoft Office suite.

Over the years, as OneNote evolved and gained popularity as a versatile note-taking application, the ONEPKG format likely emerged as a solution for efficiently managing multiple notebooks.

While specific details regarding its creation may not be publicly available, it’s clear that the ONEPKG format serves a practical purpose in the realm of digital note organization.

Tips and Tricks for ONEPKG Files

  • Regular Backups: Periodically create backups of your ONEPKG files to ensure the safety of your notes in case of unexpected data loss.
  • Organize Effectively: Utilize descriptive filenames and folder structures within your ONEPKG archives to facilitate efficient organization and retrieval of notes.
  • Optimize File Size: Consider periodically reviewing and archiving older or less frequently accessed notebooks to reduce the size of your ONEPKG files and optimize storage space usage.

More information

Here are a few additional points to consider about the ONEPKG file type:

Cross-Platform Compatibility: While Microsoft OneNote is the primary software for creating and working with ONEPKG files, users can also access their OneNote notebooks on various platforms, including Windows, macOS, iOS, and Android. This cross-platform compatibility allows users to access their notes from different devices seamlessly.

Collaborative Features: OneNote offers robust collaboration features, allowing multiple users to work on the same notebook simultaneously. This collaborative functionality extends to ONEPKG files, enabling teams to share and collaborate on collections of notebooks conveniently.

Versioning and Syncing: OneNote automatically saves changes made to notebooks and syncs them across devices through Microsoft’s cloud infrastructure. This versioning and syncing capability extends to ONEPKG files, ensuring that the latest versions of all included notebooks are readily accessible to users.

Integration with Microsoft Office: As part of the Microsoft Office suite, OneNote integrates seamlessly with other Office applications, such as Word, Excel, and PowerPoint. Users can easily incorporate content from OneNote notebooks, including those stored in ONEPKG files, into their Office documents for enhanced productivity.

Customization Options: OneNote offers extensive customization options, allowing users to personalize their notebooks with various formatting styles, templates, and organizational features. These customization options carry over to ONEPKG files, preserving the layout and design of individual notebooks within the archive.

Accessibility Features: Microsoft is committed to making its products accessible to users with disabilities, and OneNote is no exception. The application includes features such as screen readers, keyboard shortcuts, and accessibility settings to ensure that users of all abilities can effectively use and interact with their notes, including those stored in ONEPKG files.

That being said, I can safely say that the ONEPKG file type offers users a versatile and efficient way to manage their OneNote notebooks, providing flexibility, convenience, and robust functionality for organizing, sharing, and collaborating on digital notes across platforms and devices.


The ONEPKG file extension serves as a convenient solution for organizing, backing up, and sharing multiple OneNote notebooks. By bundling individual “.ONE” files into a single archive, users can streamline file management tasks and ensure the safety of their digital notes.

While primarily associated with Microsoft OneNote, ONEPKG files offer practical benefits for users seeking efficient ways to manage their note-taking workflow.

With proper usage and maintenance, ONEPKG files can enhance productivity and contribute to a more organized digital workspace.

Software Compatible With The ONEPKG File Type
Microsoft OneNote Package

In this section you will find a list of the best programs compatible with the ONEPKG file type. We've selected the best software for Windows, Mac, Android and Linux to open, edit, convert and view the contents of ONEPKG files.