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