What kind of data files can I import in a list? Stéphane Glasson December 17, 2018 08:51 Updated You can upload : .xlsx update langs set en=Excel files) Be careful ! The old Excel format .xls is not supported. Related articles How are email addresses checked/filtered during the upload? How to send a subscription confirmation email? What are the different form types? How are duplicates managed? How to insert a form in a website?