Microsoft® Excel® Spreadsheet Viewing Solution
View Excel and OpenOffice™ spreadsheets with free cross-platform Apps and APIs
Free Online App for Excel Viewing
View and convert Excel XLS, XLSX, XLSB, XLT, XLTX, XLTM, XLSM and ODS files from your favorite web browser
High Code APIs to View Spreadsheet as Image or HTML
Native APIs to view Excel & OpenOffice spreadsheets using .NET Core, Xamarin, Java, C++, Android, Node.js, PHP & Python