File Transfer Protocol / Development Terms File Transfer Protocol File Transfer Protocol, commonly known as FTP, is a standard network protocol used to transfer files between a client and a server over the Internet or a private network. It allows users to upload, download, rename, delete and move files on a remote server. FTP is often used in website development and maintenance, where teams need to manage content, themes, media and other files directly on the hosting server. To use FTP, a user typically needs an FTP client such as FileZilla, Cyberduck or WinSCP, along with credentials including the server address, username and password. Once connected, the user can view the directory structure of the remote server and perform file management tasks. FTP operates over TCP/IP and by default uses port 21. Secure alternatives such as FTPS (FTP Secure) and SFTP (SSH File Transfer Protocol) add encryption for safer data transfer, especially when working with sensitive files or credentials. FTP is essential for managing websites outside of a content management system, especially for tasks like uploading large media files, installing plugins, or troubleshooting backend issues. It allows developers and administrators to work directly with server files without needing access to a control panel. However, because traditional FTP is not encrypted, it is important to use secure versions and follow best practices for credentials and access control. For agencies, B2B companies and nonprofits managing web infrastructure, FTP remains a reliable tool for file access and deployment.