We support CSV files created on Windows, MacOS, 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. We recommend using a UTF-8 formatted CSV file with a semicolon as the delimiter to achieve the best results possible. Otherwise, the CSV file can contain further, arbitrary rows, which will also be included in the output file. The file must have at least one column with first names only or a column with full names. Click here to download a sample file. Please create a Gender-API.com account to upload a CSV file.