Formatting Issues

How to Fix Excel Cannot Apply More Fonts Error

Muhammad Talha Sep 25, 2026 869 views

Question details

The user needs to resolve an error preventing them from selecting cells or applying new formatting in their spreadsheet.

How to Fix Excel Cannot Apply More Fonts Error

Product: Microsoft Excel
Device & OS: not provided
Scenario: Changing cell formatting or selecting cells in an active workbook.
Observed behavior: Excel displays a 'Cannot apply more fonts' error message, blocking any further formatting changes even on a 64-bit installation.

Before you start

Before troubleshooting, test opening other workbooks to determine if this error occurs globally or is isolated to a single file. It is highly recommended to create a backup copy of your affected workbook before attempting any fixes.

Solution 1Recommended

Diagnose and Isolate the Affected Workbook

Identify if the formatting error is isolated to a single file and gather necessary version details for support.

This error is often file-specific, caused by workbook corruption or hitting the maximum limit of unique cell formats. Isolating the issue helps determine the best course of action.

Test multiple files

Open a new, blank workbook in Excel and attempt to apply various fonts and cell formats. If it works perfectly, the issue is isolated to your original file.

Check your Excel version

Navigate to the 'File' tab and click on 'Account'. Note down the exact version and build number under 'Product Information'.

Capture the error

Trigger the issue in the affected workbook and take a screenshot of the exact 'Cannot apply more fonts' error dialog.

Share for analysis

If you are working with an IT department or support team, share the backup copy of your file along with the version details and screenshot so the formatting data can be analyzed.

Diagnose and Isolate the Affected Workbook

File Backup: Always share a duplicate copy of the workbook rather than the original file to prevent accidental data loss during analysis.

Solution 2

Clear Excessive Formatting from Unused Cells

Remove unnecessary formatting from blank cells to reduce the overall count of unique formats in the workbook.

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Avoid Formatting Limits with WPS Office

If Microsoft Excel continues to struggle with formatting limits or file corruption, try WPS Office. It is a highly compatible, free, and lightweight alternative that handles complex spreadsheets effortlessly.

1. Download and Install: Download WPS Office for free from the official website and follow the standard installation prompts.
2. Open Your Workbook: Launch WPS Spreadsheet, go to Menu > Open, and select your affected .xlsx file.
3. Continue Editing: Apply your fonts and formatting without hitting Excel's restrictive unique format limitations.

Seamless compatibility with Microsoft Excel formats (.xlsx, .xls, .csv).Lightweight software architecture that handles large, data-heavy files efficiently.Free to use with a familiar, user-friendly interface requiring zero learning curve.Robust formatting handling to prevent frequent crashing or limitation errors.

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Frequently Asked Questions

Why does Excel say Cannot apply more fonts?

This error typically occurs when a workbook contains too many unique cell formats. Excel has a strict maximum limit on the number of different font styles, borders, and colors you can use in a single file. Once this limit is reached, the application blocks new formatting.

Does upgrading to 64-bit Excel fix the font error?

Not necessarily. The 'Cannot apply more fonts' error is typically tied to the limitations of the file's internal architecture regarding unique format combinations, which can still occur even on a 64-bit installation of Excel.

How do I prevent formatting errors in large spreadsheets?

To prevent hitting format limits, rely on standardized 'Cell Styles' instead of applying custom unique formatting to individual cells. Additionally, avoid formatting entire columns or rows into infinity, and regularly use the 'Clear Formats' tool on blank cells outside your dataset.

Document & File Issues