Hi Murali,
Thank you for reaching out! To better assist you, we would like to clarify your query. Where did you convert the file to a Base64 string, on the server-side or client-side? we understand that you have already converted the file into a Base64 string. Could you please provide more information about the uploader you mentioned? When do you need to append the Base64 string to the uploader? Additionally, any details about the purpose or desired outcome of this process would be helpful. Please let us know so that we can provide you with the most accurate solution.
Regards,
Priyanka K