Office Settings & Configuration

How to Add or Find Digital Signatures in Excel

Steve K Oct 12, 2026 869 views

Question details

The user needs to locate the feature to insert a digital signature in a workbook to authenticate and protect their file.

How to Add or Find Digital Signatures in Excel

Product: Microsoft Excel
Device & OS: not provided
Scenario: Securing and authenticating an Excel workbook with a digital signature.
Observed behavior: Digital signatures are not immediately visible as a standalone command under the File tab, making them difficult for users to find.

Before you start

Ensure you have a valid digital certificate (Digital ID) installed on your device or acquired from a trusted Certificate Authority before attempting to sign your workbook.

Solution 1Recommended

Add a Digital Signature via the Info Tab

The most secure way to add an invisible digital signature to authenticate your entire Excel workbook.

This method secures the entire document. Once applied, the workbook will be marked as final to prevent unauthorized edits.

Open the File Menu

Click on the File tab located in the top-left corner of the Excel ribbon.

Navigate to Workbook Protection

Select Info from the left-hand navigation pane, then click on the Protect Workbook button to reveal a dropdown menu.

Add the Signature

Click on Add a Digital Signature from the list, then follow the on-screen prompts to select your digital certificate and sign the file.

Add a Digital Signature via the Info Tab

Signature Applied: A signature confirmation will appear at the top of your workbook, indicating that the file is now signed and protected.

Solution 2

Insert a Visible Signature Line

Use this method if you need to place a visible signature line directly into your spreadsheet for someone to sign later.

Sign Spreadsheets easily in WPS

Easily Add Digital Signatures in WPS Spreadsheet

WPS Office offers a highly compatible and intuitive interface for securing your spreadsheets. You can easily insert and manage digital signatures to authenticate your documents without navigating through complex and hidden menus.

1. Open your spreadsheet: Launch WPS Office and open the spreadsheet you wish to digitally sign.
2. Navigate to Security: Click on the Protect tab located on the top ribbon menu.
3. Add the Signature: Select Digital Signature to open the signature manager, choose your digital ID, and apply it to authenticate your document.

Fully compatible with Microsoft Excel (.xlsx) formats and signature standards.Intuitive interface makes it simple to insert digital signatures and protect sheets.Lightweight, feature-rich, and completely free to download.

microsoft office alternative - wps office

Frequently Asked Questions

Why can't I find the Digital Signature option under the File tab?

In modern versions of Excel, the digital signature feature is nested under File > Info > Protect Workbook to group it logically with other document security and protection features, rather than leaving it as a standalone button.

What do I need to digitally sign an Excel file?

You need a valid digital certificate (also known as a digital ID). This can be issued by a trusted third-party Certificate Authority (CA) or created using a self-signed certificate utility for internal use.

Does adding a digital signature make the workbook read-only?

Yes. Once an invisible digital signature is applied to a workbook, Excel automatically marks the document as final and makes it read-only. This ensures the document cannot be modified, which would invalidate the signature.

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