How to Fix Illegible Fonts in Excel for the Web and OneDrive
Question details
The user experiences illegible text rendering, specifically with Arial fonts, when viewing a specific Excel workbook in Excel for the Web via OneDrive, despite the file displaying perfectly on desktop and mobile applications.

- Product
- Microsoft Excel for the Web
- Device & OS
- Mac
- Scenario
- Viewing an Excel workbook containing equations or special characters in a web browser via OneDrive.
- Observed behavior
- Text formatted in Arial appears scrambled or illegible in Excel for the web, while rendering correctly in the desktop Excel app and on mobile devices.
Ensure your web browser is updated to the latest version and verify if the issue occurs across different browsers like Chrome, Safari, or Edge to rule out a browser-specific rendering glitch.
Clear Browser Cache and Restart Your Mac
Clearing outdated or corrupted browser cache data can often resolve sudden font rendering and display issues in web applications.
Web applications like Excel for the Web rely on cached data to load faster. If the cached font files or scripts become corrupted, text may appear illegible. Clearing the cache forces the browser to download fresh, uncorrupted rendering instructions.
Open your web browser (e.g., Safari, Chrome, or Edge) and navigate to the Settings or Preferences menu.
Locate the Privacy or History section and select the option to clear browsing data. Ensure that 'Cached images and files' is checked before confirming the deletion.
Close the browser completely and restart your Mac to refresh system resources and clear any lingering temporary memory.
Log back into OneDrive, open the problematic Excel workbook in Excel for the web, and check if the Arial fonts now display correctly.

Isolate and Reformat Equations or Special Characters
Since the issue often targets specific files with equations, isolating or temporarily removing these elements can restore normal font display.
Resave the File in a Different Format and Re-upload
Converting the workbook format forces Excel to rewrite the underlying XML structure, which can clear hidden file corruption causing the web display issue.
Use WPS Office to Avoid Cloud Rendering Issues
If Excel for the Web continues to struggle with displaying fonts and equations properly, consider switching to WPS Office. It provides robust file compatibility and precise rendering for complex equations and formatting, ensuring your documents look exactly the same across all devices without relying on web browser rendering engines.
- 1. Download WPS Office: Download and install the free WPS Office suite on your Mac or PC.
- 2. Open WPS Spreadsheets: Launch the WPS Spreadsheets application.
- 3. Open your workbook: Click 'Open' and select your downloaded Excel file to view your data, equations, and fonts flawlessly.

Frequently Asked Questions
Why do fonts look different in Excel for the Web compared to the desktop app?
Excel for the Web relies on the fonts installed on your local device and your web browser's rendering engine. If a specific font is substituted or if the browser struggles to interpret the file's XML structure, the text may appear illegible or completely different.
Can complex equations break font rendering in Excel for the Web?
Yes, inserting complex equations or unsupported special characters in the desktop app can occasionally cause formatting conflicts when the file is parsed by the web version, leading to scrambled text rendering for standard fonts like Arial.
Does clearing my browser cache delete my OneDrive files?
No, clearing your browser cache only removes temporary internet files, cookies, and saved website interface data. Your actual Excel workbooks and documents safely remain in your Microsoft OneDrive cloud storage.




