How to Password-Protect an Excel File

Updated on:

May 12, 2026

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Use this interactive demo to learn how to secure an Excel workbook with a password in minutes.

Quick summary

You can password-protect an Excel file in just a few clicks using the built-in Protect Workbook feature under the Review tab. This prevents unauthorized users from opening or modifying your sensitive spreadsheet data.

Steps

Open your Microsoft Excel worksheet, go to the top menu bar, and click Review.
Select Protect Workbook from the available options in the Review menu.
Enter a strong password into the provided input field, then retype the password to verify the combination.
Click OK to apply the password protection changes.
Your Excel file is now password-protected and secured against unauthorized access.

📌 Why this matters

Password-protecting an Excel file is a critical step for anyone handling sensitive financial, personal, or business data in spreadsheets. Microsoft Excel's built-in Protect Workbook feature lets users lock files with a password in under a minute, without needing third-party tools. This capability helps teams maintain data security, meet compliance requirements, and prevent unauthorized edits or access. Knowing how to use Excel's native encryption keeps confidential information safe whether files are shared via email, stored on shared drives, or handed off between colleagues.

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