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.xlsm file extension

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.xlsm
Macro enabled Microsoft Excel (XML) Spreadsheet file.

A .xlsm file is a saved Excel spreadsheet file, generated with Microsoft Excel 2007 (or later) that is saved in XML format. A .xlsm file allows the use of macros (VBA) in the spreadsheet. If macros are not required then a .xlsx file can instead be used.

The file is actually a set of XML files that are compressed. The individual XML files can be viewed by renaming the .xlsm file to .zip and treating it as a .zip file.

It is possible to open .xlsm files using earlier versions of Microsoft Excel, but to do this you need the Microsoft Office Compatibility Pack. The Microsoft Office Compatibility pack is available from www.microsoft.com/downloads/details.aspx?FamilyId=941B3470-3AE9-4AEE-8F43-C6BB74CD1466&displaylang=en.

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Can you add to this? Do you know of any applications not already listed which will work with .xlsm files, view .xlsm files or open .xlsm files? Are you able to contribute any additional reference information or file format information about .xlsm files or have you spotted any errors or omissions? If so please let us know by emailing us at feedback@cryer.co.uk - Thank you.