In short
This tool turns a spreadsheet into a PDF ready to print or send, from an Excel (.xlsx, .xls, .xlsm, .xlsb), OpenDocument (.ods) or CSV file. It produces a paginated table, titled with the file name, whose first row can be repeated as a header on every page. The orientation is chosen according to the number of columns, landscape beyond six, or set to portrait or landscape, and each column gets a width suited to its content. Values keep their format (numbers, dates, amounts), but the workbook's colours, borders, charts and images are not carried over. It converts one sheet per PDF, up to 40 columns and 20,000 rows. The conversion happens in your browser.