If you're looking for a standalone free application to open an excel file, Spreadsheet UWP might be for you. Spreadsheet UWP is a spreadsheet application that supports opening and creating xlsx and xls files. It also supports opening and exporting csv files. It supports many features of Microsoft Excel, including support for charts and support for many formulas. Of course, it doesn't have all the features of Microsoft Excel. But I think it can handle a less complicated Excel file. Spreadsheet UWP is Free app, but there are ads. The advertisement is on the right side, which does not affect the normal operation. You can also pay a small fee to remove the ads if you wish.