We support CSV files created on Windows, Mac OSX or Linux. In addition, we support files with delimiters like ";", "," or a tab. The enclosure char must be a ". Furthermore, you can upload multi-line CSV files with a maximum of 10,000,000 rows and 301MB. To achieve the best results possible, we however recommend using a UTF-8 formatted CSV file with semicolon as delimiter. Otherwise, the CSV file can contain further, arbitrary rows which will also be included in the output file. The file must contain at least one column with first names only. Click here to download a sample file. Please create a Gender-API.com account to upload a CSV file.