.XLSMHTML File Extension
File TypeMicrosoft Excel MIME HTML Spreadsheet
File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.
What is an XLSMHTML file?
Archived MIME HTML spreadsheet file saved by earlier versions of the Microsoft Excel spreadsheet application; contains HTML code that represents the spreadsheet in a format similar to the original .XLS file; used for viewing published spreadsheets in a Web browser.