Excel Performance Problems

How to Fix Black and Green Cells in Excel for the Web

Adam DavisAdam Davis Nov 4, 2026 872 views

Question details

The user is encountering a display issue where spreadsheet cells appear as solid black and green blocks in Excel for the web, obstructing the actual data.

How to Fix Black and Green Cells in Excel for the Web
Product
Excel for the Web
Device & OS
not provided
Scenario
Viewing or editing a spreadsheet online through a web browser, particularly in Microsoft Edge.
Observed behavior
Cells render incorrectly with solid black and green colors instead of displaying the intended text, numbers, and formatting.
Before you start

Ensure you have saved your work and closed any active spreadsheet tabs. Note which web browser you are currently using, as this is typically a browser-specific graphics issue.

Solution 1Recommended

Clear Browser Cache and Restart Your Session

Refreshing your session and clearing cached site data often resolves temporary web rendering glitches.

Corrupted cache files in your browser can interfere with how web applications like Microsoft 365 render graphics. Starting completely fresh is the best initial troubleshooting step.

1
Sign Out

Save your Excel file, click on your profile picture in the top right corner of Microsoft 365, and select Sign Out.

2
Restart Computer

Close your browser completely and restart your computer to clear out any temporary system processes.

3
Clear Browser Cache

Open your web browser, navigate to the browser settings (Privacy and Security), and clear your cached images and files.

4
Sign In and Test

Navigate back to Microsoft 365, sign in, and open your Excel file to check if the cells now display correctly.

Clear Browser Cache and Restart Your Session
Data Safety: This visual glitch does not alter your actual spreadsheet data. Your cell contents and formulas remain intact and secure even when obscured.
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  1. 1. Download and Install: Visit the official WPS Office website to download the free installation package for your operating system.
  2. 2. Open WPS Spreadsheet: Launch WPS Office and click on 'Spreadsheet' to start a new workspace.
  3. 3. Edit Seamlessly: Drag and drop your existing Excel files directly into WPS to continue working without any display glitches.
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Frequently Asked Questions

Why do my Excel cells suddenly turn black and green?

This is typically caused by a graphics rendering conflict between your web browser and your computer's graphics card. It is especially common in certain versions of Microsoft Edge when hardware acceleration is enabled.

Does this rendering issue corrupt my actual spreadsheet data?

No, the black and green cells are strictly a visual display issue within the web browser. Your underlying data, formatting, and formulas remain entirely intact and unaffected.

Which web browsers are best for running Excel for the web smoothly?

While Microsoft Edge is optimized for Microsoft 365, Google Chrome and Mozilla Firefox are excellent alternatives that often bypass Edge-specific rendering glitches.

Will disabling hardware acceleration slow down my web browser?

It might slightly reduce performance for heavily graphic-intensive web tasks like high-definition video streaming or browser gaming, but it generally will not noticeably affect normal web browsing or office web applications.