Download XLS Viewer, Editor chrome extension. Lets you view and edit XLS files without leaving your browser. The supported file formats are spreadsheets, xls, xlsx, csv, sxc. and install in your Google chrome browser. This is Direct XLS Viewer, Editor Crx download for Chrome it is also called XLS Viewer, Editor offline CRX for chrome Download. This XLS Viewer, Editor is used to Lets you view and edit XLS files without leaving your browser. The supported file formats are spreadsheets, xls, xlsx, csv, sxc.