: Use the XlsxWriter or Pandas libraries to write a single dataframe to an in-memory buffer ( BytesIO ).
: 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.
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 Download one sheet xlsx
For a custom dashboard or website, you need to generate the file in memory and trigger a browser download.
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. : Use the XlsxWriter or Pandas libraries to
: Pass output.getvalue() to a download button component to serve the file directly to the user. Method 3: Manual Workflow (Excel Desktop)
: Use SpreadsheetApp.getUi().showModalDialog() to display a "Click to Download" link to the user. Method 2: Custom Web App (JavaScript / Python) If you want a button within Google Sheets
: Use libraries like SheetJS (xlsx) to convert JSON or HTML table data directly into an .xlsx blob.