Excel® Add-In “decompiler”

Have you ever made an Excel add-in and then misplaced the original xls-file? Then you can find the solution here.

Here you buy an Excel add-in that converts Excel add-ins back to xls-format. Due to the possible misuse of this program, I have chosen not to distribute it free of charge but to sell it.

The decompiler is dead, long live the “decompiler”. This page has been closed for a long time due to complaints from Microsoft (which is a compliment, really). Their complaint was that they claim that it is illegal to decompile programs. As Excel add-ins are not really compiled, there should be no problem. Since my program does not decompile add-ins but just make them viewable, I’ve now called it the Add-in “decompiler”. You must accept to use this program only on add-ins of which you are the legitimate owner of the source code.

For add-ins made in Excel 97/2000/2002 the only thing that differs between add-ins and ordinary workbooks is the IsAddin-property of the workbook. If the Visual Basic code is password protected, and you have forgot your password, you can find the solution here: VBA Key


The Add-in “decompiler” converts add-ins that where made in Excel 5.0/7.0 (95) into normal Excel workbooks. All password protection is removed and all hidden sheets are made visible. Visual Basic code is also visible. Of course, only add-ins that are made in Excel can be converted to workbooks (it is also possible to write add-ins using C). In Excel 2002 it may take several minutes to finish (depending on the length and number of passwords), but in earlier versions it normally finishes in seconds.

The Add-in “decompiler” works in all versions of Excel from 5.0 and above (Excel 7.0 / Excel 95 / Excel 2000 / Excel 2002 / Office XP)


If you are interested in buying this product (US$45 for personal use, US$90 for business use) then send me an email stating your interest: decompiler@straxx.com (An automated billing and download service will hopefully be set up soon, but for now contact me by email).

Your email should include the following information:
         - Which Excel version you are using, including which language version it is
         - Which license type you want: Personal or business license



The Add-in “decompiler” is Copyright (C) 1997 by Einar Ståle Huse and is protected as such under international treaty provisions. All Rights Reserved.

There is no warranty, express or implied, with the Add-in “decompiler”. There is no warranty of non-infringement on third parties' rights.

You may not rent, lease or offer the use of the Add-in “decompiler”. You may not reverse engineer, decompile or disassemble the Add-in “decompiler”.

In no event shall the author be held liable for misuse of this product, any loss of data, down time, loss of revenue or any other direct or indirect damage or claims arising from the use of the Add-in “decompiler”.



Excel is a registered trademark of the Microsoft Corporation.

Contact: decompiler@straxx.com