: Create a Blob with the type application/vnd.openxmlformats-officedocument.spreadsheetml.sheet , then use a temporary tag with the download attribute to trigger the save.

For a custom dashboard or website, you need to generate the file in memory and trigger a browser download.

: Use the XlsxWriter or Pandas libraries to write a single dataframe to an in-memory buffer ( BytesIO ).

To develop a feature for downloading a single sheet as an .xlsx file, the implementation depends on whether you are working within an existing platform (like Google Sheets) or building a custom web application.

: The script copies the active sheet to a temporary spreadsheet and generates a download URL for that specific file in .xlsx format.

If you want a button within Google Sheets that downloads only the current sheet, you can use a script to extract just that tab and serve it as a download link.