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Office Settings & Configuration

Why OneNote Custom Tags Do Not Sync to the Web App

Steve KSteve K Oct 10, 2026 869 views

Question details

The user wants to access, copy, or use custom tags created in the OneNote desktop application within OneNote for the web.

Why OneNote Custom Tags Do Not Sync to the Web App
Product
Microsoft OneNote
Device & OS
not provided
Scenario
Attempting to apply or manage custom tags in OneNote for the web after creating them in the desktop application.
Observed behavior
Custom tags created in the desktop app do not appear in the web app's tag list, preventing the user from applying them to new web content.
Before you start

Ensure your OneNote desktop notebooks are fully synchronized to your OneDrive account so that previously tagged content is correctly visible online.

Solution 1Recommended

Use Built-In Tags for Cross-Platform Compatibility

Since custom tags are stored locally on the device where they are created, relying on built-in tags is the best way to ensure full tag functionality across both desktop and web platforms.

Microsoft OneNote stores custom tags as a local application preference rather than as notebook data. Because of this architecture, the tag settings themselves cannot synchronize to the cloud. However, any text that has already been tagged on the desktop will display the tag icon correctly when viewed in OneNote for the web.

1
Apply tags on desktop

Open the OneNote desktop application where your custom tags are saved and apply them to the necessary notes.

2
Sync notebook

Wait for the notebook to fully synchronize to OneDrive. You can check the sync status by right-clicking the notebook name and selecting 'Sync This Notebook Now'.

3
View existing tags online

Open OneNote for the web and navigate to your notebook. You will see the custom tags correctly displayed on your existing content.

4
Use built-in tags for new content

For new notes created directly in the web app, click the 'Tags' dropdown menu in the Home tab and select standard built-in tags (like 'To Do' or 'Important') which are natively supported online.

Use Built-In Tags for Cross-Platform Compatibility
Modified Built-in Tags: If you customize the default built-in tags in the desktop app, they are treated as custom tags and will also fail to sync their modified settings to the web app.
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Frequently Asked Questions

Can I manually copy custom tags to another computer?

Custom tags are stored in the local preferences file of your specific OneNote desktop installation. While you cannot sync them via the cloud, advanced users can sometimes transfer the 'preferences.dat' file to another Windows PC to migrate tags, though this is not officially supported by Microsoft.

Will my custom tags show up in the OneNote mobile app?

Similar to the web app, the OneNote mobile applications for iOS and Android will correctly display custom tags on existing notes that were synced from the desktop. However, you cannot apply your custom tags to new notes created on the mobile device.

How can I search for my custom tags if they don't sync online?

You cannot search for custom tags directly in OneNote for the web. To manage tagged items, use the 'Find Tags' feature in the desktop application to generate a summary page. Once created, this summary page will sync to OneDrive and can be easily viewed in the web app.