Please Note: This article is written for users of the following Microsoft Excel versions: 2007, 2010, 2013, 2016, 2019, 2021, 2024, and Excel in Microsoft 365. If you are using an earlier version (Excel 2003 or earlier), this tip may not work for you. For a version of this tip written specifically for earlier versions of Excel, click here: Creating Add-Ins.
Any Excel workbook can be converted to an add-in. The steps you need to follow to create an add-in are very precise, and may seem a bit overwhelming (particularly the first couple of times you do it). To create a protected add-in file, you need to do a little work in the VBA Editor and in Excel itself. First, here are the steps to follow to get the settings correct in the VBA Editor:

Figure 1. The Protection tab of the project�s Properties dialog box.
Now it is time to do a little work in Excel. Follow these steps if you are using Excel 2010 or a later version:

Figure 2. The Summary tab of the workbook�s Properties dialog box.
The steps are slightly different in Excel 2007:
Note:
ExcelTips is your source for cost-effective Microsoft Excel training. This tip (8528) applies to Microsoft Excel 2007, 2010, 2013, 2016, 2019, 2021, 2024, and Excel in Microsoft 365. You can find a version of this tip for the older menu interface of Excel here: Creating Add-Ins.
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2026-06-21 10:32:00
J. Woolley
The Tip's first 9 steps apply protection. This is not necessary, especially if you don't intend to distribute your add-in. If you create an add-in strictly for your own use, I recommend leaving it unprotected because it is easier to maintain.
Like Personal.xlsb, your custom add-in's procedures can be used in multiple workbooks, but first your add-in must be installed; the Tip does not address that part.
My Excel Toolbox references these five articles about creating, installing, and updating a custom Excel add-in:
https://www.myonlinetraininghub.com/create-an-excel-add-in-for-user-defined-functions-udfs
https://bettersolutions.com/excel/add-ins/creating.htm
https://bettersolutions.com/excel/add-ins/installing.htm
https://support.microsoft.com/en-us/Search/?query=Excel+add-in
https://www.thevbahelp.com/post/installing-and-updating-add-ins
My Excel Toolbox's unprotected add-in file is distributed via download.
See https://sites.google.com/view/MyExcelToolbox/
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