PHPExcel is a helpful tool that allows you to work with or create Microsoft Excel spreadsheets. This software is built using the programming language, PHP, and includes a collection of classes designed specifically for interacting with different types of spreadsheet files like Excel 2007 .XLSX or the older format, .XLS. PHPExcel offers a wide range of features that can be discovered with usage over time. It is not only compatible with Microsoft Excel but also works well with several other formats too, providing versatility and flexibility for users who need to work on multiple platforms.