User Manual: CSV Importer: Saving Files as CSV
Data from LibreOffice Calc, Microsoft Excel, Google Sheets, and other spreadsheet programs can be saved in the .csv format. Ensure that you save files with UTF-8 character encoding.
Tip: If you used the GitHub generated template, be sure to delete Rows 1-7 and Column A before saving as CSV / uploading to the CSV Importer.
LibreOffice Calc (recommended, available here)
From an open spreadsheet, select File > Save As > File type: Text CSV
Check the Edit filter settings box
Click save
A settings dialog box will open. Make sure the settings are as shown:
If you have more than one sheet, only the active sheet will be saved as CSV
Tip: LibreOffice is a free open-source application, and it handles international character sets and CSV files much better than Excel. It also does not “helpfully” change the format of your dates, change non-dates to dates, remove “decimals” from identification number strings, or convert ISBNs to scientific notation number format.
If you’re not a regular user of LibreOffice, you can always create spreadsheets in the program of your choice, save, open in LibreOffice Calc, and then convert to CSV from there.
Microsoft Excel
From an open spreadsheet, select File > Save As > Comma Separated Values (.csv)
You may choose CSV UTF-8 or Microsoft CSV
If you have more than one sheet, only the active sheet will be saved as CSV
Google Sheets
From an open spreadsheet, select File > Download > Comma Separated Values (CSV)
If you have more than one sheet, only the active sheet will be downloaded as CSV