PuTTY is a free-to-use, open-source, and easy-to-use terminal application. Developers use this SSH client to connect a Windows computer to a Linux system. With multiple customisation options, PuTTY for Windows lets you configure different settings to suit your preferences. However, the configuration options can be difficult to manage, especially for beginners. With PuTTY, you can initiate safe file transfers via SFTP, SCP, telnet, SSH, and rlogin. Moreover, PuTTY is an excellent choice for creating a secure SSH tunnel handling X11 web traffic.