客户端处理和解析csv文件，而不会将其上传到某个服务器

I am trying to create a utility website that will parse csv files uploaded by clients. I want the processing to happen completely on the client side rather than having the file be uploaded to some server and then some server program parsing out the contents of the file. Is this possible? I'm a backend guy so any frontend advice would be helpful.I am trying to create a utility website that wi