Excel Performance Problems

How to Fix Excel Files Loading Slowly in Microsoft Teams Free

Elise WilliamsElise Williams Nov 2, 2026 870 views

Question details

User experiences long wait times when attempting to open small, minimally formatted Excel files within the Microsoft Teams Free application.

How to Fix Excel Files Loading Slowly in Microsoft Teams Free
Product
Microsoft Teams / Microsoft Excel
Device & OS
not provided
Scenario
Opening and viewing shared Excel spreadsheets directly within the Microsoft Teams Free desktop or web interface using a Microsoft 365 Family subscription.
Observed behavior
Excel files load significantly slower than expected, likely due to differences in background storage architecture between personal OneDrive and business SharePoint accounts.
Before you start

Verify that your internet connection is stable and ensure your Microsoft Teams application is updated to the latest version before troubleshooting.

Solution 1Recommended

Open the Excel File in the Desktop Application

Bypass the built-in Microsoft Teams viewer to leverage the full processing power of your local desktop Excel application, avoiding cloud-viewer latency.

Microsoft Teams Free relies on personal OneDrive storage architecture rather than SharePoint, which can sometimes cause the in-app file viewer to buffer. Opening the file directly in your desktop application eliminates this bottleneck.

1
Locate the file in Teams

Navigate to the chat or channel where the slow-loading Excel file is shared.

2
Access file options

Hover over the Excel file message and click the 'More attachment options' (three dots) icon next to the file name.

3
Select Open in app

Click 'Open' from the dropdown menu, then select 'Open in app'. This will launch your local spreadsheet software instead of the Teams viewer.

Open the Excel File in the Desktop Application
Default Setting Tip: You can change your default file opening behavior in Teams by going to Settings > Files and links > File open preference, and selecting 'Desktop app'.
Free Microsoft Office alternative

Experience Faster Spreadsheet Loading with WPS Office

If cloud synchronization delays in Microsoft Teams and Office 365 are slowing down your workflow, WPS Office offers a lightning-fast, lightweight alternative. Enjoy instant file loading without relying on complex cloud architectures, while maintaining perfect compatibility with your team's files.

  1. 1. Download WPS Office: Get the free installer from the official WPS Office website and complete the quick installation.
  2. 2. Download your Teams file: Save the slow-loading Excel file from Microsoft Teams to your local hard drive.
  3. 3. Open instantly: Right-click the downloaded file, select 'Open with', and choose WPS Spreadsheets for immediate access.
Seamlessly opens and edits Microsoft Excel formats (.xlsx, .xls, .csv)Lightweight installation ensures rapid startup and faster file loadingWork locally without forced cloud synchronization delaysFree to use with a familiar, easy-to-navigate interface
microsoft office alternative - wps office

Frequently Asked Questions

Why do Excel files load differently in Teams Free vs Teams for Business?

Teams for Business accounts integrate with SharePoint, which is optimized for enterprise file sharing and collaboration. Teams Free utilizes personal OneDrive storage, which has a different background architecture that can sometimes result in slower loading times for shared documents.

Does file size or formatting impact loading times in Microsoft Teams?

Yes. Even if a file has minimal formatting, a large file size, extensive version history, or embedded complex formulas can cause the in-app Teams viewer to buffer. Downloading the file and opening it locally usually resolves this.

How can I stop Teams from opening Excel files in the built-in viewer?

You can change your default settings. In Teams, go to Settings > Files and links. Under 'File open preference', change the setting from 'Teams' to 'Desktop app'. This ensures all future Excel files open directly in your local spreadsheet software.