ListClean accepts CSV and TXT files. The maximum file size is 30MB and the maximum number of allowed emails per file is 500,000.
If you are going to upload a CSV file, your CSV files must include the email column and the email addresses must be on the same column. It can include other columns such as Names, etc. Our tool keeps the extra columns and will be available again in the validation report.
If you are going to upload a TXT file, this file must include only emails, only one email per line with no extra characters such as white spaces or , and ; sings.