It should be quite possible to make XLSX workbook out of XLSMHTML source using Microsoft Excel.
Home > Search converters: xlsmhtml to xlsx
Conversion of xlsmhtml file format to xlsx file format beta
Search for xlsmhtml to xlsx converter or software able to handle these file types.
Convert Microsoft Excel MIME HTML spreadsheet to Microsoft Excel Open XML workbook and spreadsheet.
We have found 2 software records in our database eligible for .xlsmhtml to .xlsx file format conversion.
Microsoft Windows software 
- convert xlsmhtml to xlsx on Windows
Microsoft Excel
A popular spreadsheet application distributed with Microsoft Office suite
File extension | Convert | Open | Save | Edit | Create | Import | Export | Extract |
|---|---|---|---|---|---|---|---|---|
Convert from xlsmhtml file | No | Yes | Yes | xlsmhtml editor | Yes | No | No | No |
to xlsx file | Yes, Microsoft Excel supports xlsx file conversion as a target file type. | Yes | Yes | xlsx editor | Yes | No | No | No |
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned xlsmhtml to xlsx. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
Apple macOS / Mac OS X software 
- convert xlsmhtml to xlsx on OS X
Microsoft Excel for Mac
A popular spreadsheet application from the Microsoft Office suite
Additional links: Open xlsmhtml file, Open xlsx file
XLSMHTML
Files with xlsmhtml file extension can be typically found as spreadsheets from Microsoft Excel. Specialized MIME HTML format.
XLSX
Files with xlsx extension are s used by Microsoft Excel for its workbooks (spreadsheets) in Office Open XML format. XLSX is the latest spreadsheet format used by Excel with the adoption of XML formatting first used in Office 2007. While older xls files were in proprietary binary file format, xlsx spreadsheets use a somewhat altered XML scheme.
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