There are a number of formats that Aspose.Cells for Cloud can convert from xlsx.
Can those same file formats be converted to xlsx via Aspose.Cells for Cloud?
Say can I take a CSV file and convert it to xlsx via Aspose.Cells for Cloud?
Thank you for contacting support. Please note that Aspose.Cells for Cloud mimics the behavior of MS Excel. Based on your inquiry, those same file formats cannot be converted to the xlsx file format. For example you can convert xlsx to pdf but not vice versa. Anyway in your case CSV file can be converted to xlsx. It is supported in the base code. It seems an issue with cloud service. I have logged an investigation to check its support. This task has been logged under ticket id SAASCELLS-63 in our issue tracking system. Your request has also been linked to this issue. We will let you know once it is fixed. We’re sorry for your inconvenience.