Excel
Select workbook data safely
The preview accepts up to 10 XLSX, CSV, or TSV files, maximum 50 MB each.
What you should know
- Selecting files keeps them in your browser.
- Browser checks cover visible file extension and size only.
- XLS and XLSM are not supported.
- Authenticated upload and processing submission are disabled.
Authoritative guide14-files-and-outputs.md
The complete guide is maintained in the versioned NextGen user documentation.