To upload a file to an SFTP server, connect to the server, navigate to the target directory, and use the put command or drag the file into your SFTP client. The file is transferred over the encrypted SSH connection.
After connecting with sftp username@host, run cd /remote/path to choose the destination, then put localfile.csv to upload. Use put -r myfolder to upload a whole directory.
With FlowSetu's online SFTP client, open the target folder and drag files or entire folders onto the window, or use the upload button. Progress is shown per file and large uploads are streamed.
You can try all of this without installing anything using FlowSetu's free online SFTP client.
Try the free online SFTP client — connect to any SFTP server from your browser, no install required.