How to Add an Index to a Document in Word Online
Question details
The user needs to create an index for a document using Word Online with a school email account, but is unable to locate the index creation feature.
- Product
- Microsoft Word Online
- Device & OS
- not provided
- Scenario
- Editing and formatting a document in a web browser using a Microsoft school account.
- Observed behavior
- The Mark Entry and Insert Index options are completely missing from the References ribbon in the web version of Word.
Verify whether your school account includes a license for the Microsoft Office desktop applications, as you will need to switch from the web version to the desktop app to use this feature.
Open the Document in the Desktop Version of Word
Since Word for the Web does not support indexing, switching to the full desktop application is the most efficient way to access the required referencing tools.
Microsoft Word Online is a streamlined version of the software designed for quick edits. Advanced features like document indexing are exclusively available in the desktop application.
While viewing your document in Word Online, look for the 'Editing' or 'Viewing' button on the top ribbon, click it, and select 'Open in Desktop App'.
Once the document opens in desktop Word, highlight the word you want to index, navigate to the 'References' tab, and click 'Mark Entry' in the Index group.
Scroll to the end of your document where you want the index to appear. On the 'References' tab, click 'Insert Index', choose your preferred format, and click 'OK'.
Create the Index Manually
If you cannot install or access the desktop version of Word, you can manually type out the index as a workaround.
Create Document Indexes Easily with WPS Office
If you are restricted by the limitations of Word Online and cannot access Microsoft's desktop apps, WPS Office is a powerful, free alternative. It offers a fully-featured desktop application that handles advanced document formatting, including index creation, without requiring an expensive subscription.
- 1. Download and install WPS Office: Get the free WPS Office desktop application from the official website and install it on your computer.
- 2. Open your document: Download your document from Word Online and open the .docx file directly in WPS Writer.
- 3. Insert your index: Navigate to the 'References' tab in WPS Writer, where you can seamlessly mark entries and generate your document index.

Frequently Asked Questions
Why is the index feature missing in Word Online?
Word Online is a lightweight, browser-based version of Microsoft Word designed for basic editing and collaboration. Advanced formatting and referencing tools, such as index creation and bibliography management, require the processing power of the full desktop application.
Will my index update automatically if I continue editing in Word Online?
No. If you create an index in the desktop app and later add text in Word Online that shifts your page numbers, the index will not update automatically. You must open the document in the desktop app again and right-click the index to select 'Update Field'.
Can I use a school account to download the desktop version of Word?
This depends on the specific Microsoft 365 license your school provides. Many educational institutions include desktop app licenses (A3 or A5 plans), allowing you to download Word from your Microsoft account dashboard. However, basic plans (A1) only provide access to the web versions.
Does Word Online support generating a Table of Contents?
Yes, unlike document indexes, Word Online does support generating a basic Table of Contents. You can find this option under the 'References' tab, provided you have formatted your document using standard Heading styles.




