Fix SharePoint Excel for the Web Loading and Sign-In Issues
Question details
Users are experiencing endless loading screens or continuous sign-in prompts when attempting to open Excel files hosted on SharePoint.
- Product
- SharePoint Excel for the Web
- Device & OS
- not provided
- Scenario
- Opening an Excel workbook hosted on a SharePoint document library using a web browser.
- Observed behavior
- The Excel file fails to load properly, getting stuck in an infinite loading loop or repeatedly prompting the user to sign in despite already being authenticated.
Ensure you have a stable internet connection and verify that your Microsoft 365 subscription is active before troubleshooting browser session and account credential issues.
Use a Private Window or Alternative Browser
Opening SharePoint in an incognito or private window isolates the issue from conflicting browser extensions or stale login sessions.
Often, browsers hold onto old cached credentials or use extensions that interfere with Microsoft 365 authentication. Using a private window allows you to log in cleanly without background interference.
Launch your current web browser and open a new Incognito or InPrivate window (usually by pressing Ctrl+Shift+N or Ctrl+Shift+P).
Navigate directly to your SharePoint document library and log in using the correct Microsoft 365 account credentials.
Click the Excel file to verify if it loads successfully in the browser without triggering the repeated sign-in prompts.
Clear Browser Cookies and Cached Credentials
Removes corrupted or conflicting session data that triggers endless SharePoint sign-in loops.
Open the Workbook in the Desktop App
Bypasses web browser limitations and restrictions related to oversized or highly complex workbooks.
Edit SharePoint Spreadsheets Offline with WPS Office
If Microsoft Excel for the Web continues to freeze or prompt for logins, you can easily download your SharePoint files and work on them using WPS Office. It provides a robust, lightweight desktop alternative that bypasses browser-based loading errors.
- 1. Download your file: Select your problematic file in the SharePoint library and click 'Download' to save it to your local computer.
- 2. Install WPS Office: Download and install the free WPS Office suite on your PC or Mac.
- 3. Edit seamlessly: Right-click the downloaded Excel file and choose 'Open with WPS Office' to start editing without web browser limits.
Frequently Asked Questions
Why does Excel for the Web say my workbook is too large to open?
Excel for the Web enforces strict file size limits (often 5MB to 25MB depending on your Microsoft 365 environment). If your workbook exceeds this limit, contains heavy formatting, or has complex data models, it cannot be rendered in a browser and must be opened in a desktop application.
Will clearing my browser cookies delete my Excel files on SharePoint?
No. Clearing your browser cookies and cache only removes temporary internet files, tracking data, and stored login sessions from your local device. Your Excel files and SharePoint data remain securely stored on Microsoft's cloud servers.
How do I fix conflicting credentials in Microsoft 365?
Conflicting credentials happen when multiple Microsoft accounts (e.g., personal and work) are logged in simultaneously. To fix this, sign out of all Microsoft accounts in your browser, clear your cache, or use a separate browser profile designated strictly for your work or school account.
Can I force SharePoint files to always open in the desktop app?
Yes. Site administrators or owners can change this behavior by navigating to Library Settings > Advanced settings. Under the 'Opening Documents in the Browser' section, change the default selection to 'Open in the client application'.
