This viewer lets you view and edit XLS files without leaving your browser. The supported file formats are MS Excel Workbook (.xls & .xlsx), CSV (.csv), Open Document (.ods), Tab Separated Values (.tsv) and OpenOffice Calc (.sxc) Documents. It is a fast and light weight app for Excel type documents. Provides connect with Google Drive. You can open Excel type files from your computer, URL or from Google Drive.