HTML5 Spreadsheet Editor is a web application that loads a Microsoft Excel file, and lets you view and edit it in a web browser. The initial version is limited in its functionality. Aspose team will release newer versions from time to time to make a complete replacement of desktop software. The best part is – it is open source. You can embed HTML5 Spreadsheet Editor in any website of your choice using IFRAME. HTML5 Spreadsheet Editor requires any standard compliant Java application server that supports CDI. I have tested it on Glassfish 4.0. Just download the source code and build using Maven. The file can be opened by specifying it in URL. It supports features like Opening a workbook, viewing a Workbook, working with Sheets, editing cells and working with Rows.