Aspose.Cells Cloud REST API allows merging multiple Excel files into a single Excel file and provides SDKs for multiple programming languages, including Android, C#, Go, Java, NodeJS, Perl, PHP, Python, Ruby, and Swift....Formats Microsoft Excel: Xls, Xlsx, Xlsb, Xlsm, Xlt, Xltx, Xltm...Markdown Microsoft Excel: Xls, Xlsx, Xlsb, Xlsm, Xlt, Xltx, Xltm...