Importing data — Add your files

Drop files onto the upload area, or click browse to pick them. CSV files and Excel workbooks (.xlsx and .xls) both work, and you can add several files in one go. • Each CSV file becomes one table. Each sheet in an Excel workbook becomes its own table, so a whole workbook imports as a connected set. • The first row of each file or sheet is read as column headers, and a second header row under it is recognised (see A second header row). A file or sheet needs at least one data row under its headers to be included. • Every sheet appears as a card showing its column and row counts — click ✕ to remove one before analyzing.