WinSCP is a free and open-source file transfer application for Microsoft Windows. It supports various protocols such as SFTP, FTP, WebDAV, Amazon S3, and SCP. Its main function is to transfer files securely between a local computer and a remote server. Beyond this, WinSCP offers basic file manager and file synchronization functionality. Some of its features include:

• Graphical user interface with drag and drop functionality
• Translated into many languages
• Integration with Windows (URL, shortcut icons, jump list)
• Support for SFTP and SCP protocols over SSH and FTP and WebDAV and S3 protocols
• Optionally protects stored site information with a master password
• Optionally supports portable operation using a configuration file in place of registry entries, suitable for operation from removable media

WinSCP uses the Secure Shell protocol (SSH) for secure transfers and supports the SCP protocol in addition to SFTP. It was developed around March 2000 and continues to be developed. WinSCP is based on the implementation of the SSH protocol from PuTTY and FTP protocol from FileZilla. It is also available as a plugin for Altap Salamander file manager, and there exists a third-party plugin for the FAR file manager.

In summary, WinSCP is a free and open-source file transfer application that supports various protocols and offers basic file manager and file synchronization functionality. It uses the Secure Shell protocol (SSH) for secure transfers and supports the SCP protocol in addition to SFTP.