Most FTP programs have "AUTO" mode, which will tell the FTP client to automatically detect the file type you're transferring and will select the appropriate mode.

By default, most FTP programs will attempt to transfer everything in binary mode, but when "Automatic" is selected, the FTP client will check a list of known ASCII extensions, (for example, .pl, .cgi, .txt). 

If it detects one of these extensions, it automatically switches to ASCII mode.
 

By Default, most of the well-known files to be uploaded in ASCII are already entered, however you can manual.htmlly add additional extensions that you would like to transfer in ASCII mode by selecting the feature called "Extensions." 

Here, you can any additional extensions that will cause the FTP client to toggle to ASCII mode automatically upon detecting an extension entered in its list.