Most spreadsheet tools like Excel and Google Sheets can export to the .csv file format. You will need to format your spreadsheet correctly in order for the file import to work. In column A you need to include the full name (Firstname Lastname). In column B you need to include the email of the student. Below is an example of a properly formatted Google Spreadsheet.

Make sure to save your .csv file with UTF-8 encoding. If the csv file has a different encoding we will try our best to convert it to UTF-8, but that might not work.