Software & Apps File Types 25 25 people found this article helpful What Is an XLSM File? How to open, edit, and convert XLSM files by Tim Fisher General Manager, VP, Lifewire.com Tim Fisher has 30+ years' professional technology support experience. He writes troubleshooting content and is the General Manager of Lifewire. our editorial process Facebook Twitter LinkedIn Tim Fisher Updated on July 07, 2020 File Types Design Cryptocurrency MS Office Windows Linux Google Drive Apps File Types Backup & Utilities View More Tweet Share Email A file with the XLSM file extension is an Excel Macro-Enabled Workbook file created in Excel 2007 or newer. These files are identical to Microsoft Excel Open XML Format Spreadsheet (XLSX) files with the only difference being that XLSM files will execute embedded macros that are programmed in the Visual Basic for Applications (VBA) language. Just like with XLSX files, this format uses XML and ZIP to store things like text and formulas into cells that are organized into rows and columns. The data can be cataloged within separate sheets, all stored in a single workbook file. How to Open an XLSM File XLSM files have the potential to store and execute destructive, malicious code through macros. Take great care when opening executable file formats like this that you received via email or downloaded from websites you're not familiar with. See our List of Executable File Extensions for a listing of file extensions to avoid and why. Microsoft Excel (version 2007 and above) is the primary software program used to open and edit XLSM files. They can be used in older versions of Excel, too, but only if you install the free Microsoft Office Compatibility Pack. You can use XLSM files without Excel with free programs like OpenOffice Calc and WPS Office Spreadsheets. Another example of a free Office alternative that lets you edit and save back to this format is Microsoft Excel Online. Google Sheets is another way to open and edit an XLSM file online. Details for how to do that are below. Quattro Pro, a part of WordPerfect Office, supports this format, too, but it's not free. OfficeSuite Professional for Android and iOS works as well. How to Convert an XLSM File The best way to convert an XLSM file is to open it in one of the editors above, and then save the open file to another format. For example, if the file is opened in Excel, it can be saved to XLSX, XLS, PDF, HTM, CSV, and other similar formats. Another way to convert one is to use a free file converter. One example is FileZigZag, which can save the file to many of the same formats supported by Excel, as well as ODS, XLT, TXT, XHTML, and some less common ones like OTS, VOR, STC, and UOS. If you're not wanting to download a converter and would like to save the file online to access it later, use the Google Sheets online spreadsheet tool. Doing this converts the file into a special format so that you can make changes to it. Here's how: Upload it to your Google Drive account through the New > File upload option. Choose Folder upload instead if you need to upload an entire folder of them. Right-click the XLSM file in Google Drive and select Open with > Google Sheets. It will automatically convert to a format that lets you read and use the file with Google Sheets. Both the original file and the converted one now exist in your Google Drive account. The one that can be edited in Google Sheets is identified by a green icon with an off-centered white cross. You can even use Google Sheets to convert an XLSM file to a different format. With the file open there, go to File > Download to download it as an XLSX, ODS, PDF, HTML, CSV, or TSV file. More Information on XLSM Files Macros in XLSM files won't run by default because Excel disables them. Microsoft has an explanation on enabling and disabling macros in Office files if you need help. An Excel file with a similar file extension is the XLSMHTML file, which is similar to XLS files but is an Archived MIME HTML spreadsheet file used with older versions of Excel to show the spreadsheet data in HTML. Newer versions of Excel use MHTML or MHT to publish Excel documents to HTML. XLSX files can contain macros as well but Excel won't use them unless the file is in this XLSM format.