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.

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

: 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.

: Use libraries like SheetJS (xlsx) to convert JSON or HTML table data directly into an .xlsx blob.

If you are doing this manually in Excel and want to save just one sheet as its own file: Download Button with Excel File - Using Streamlit

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

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.