PuTTY is a free and open-source data transfer, terminal emulator, and serial console for Windows. It supports various network protocols to establish a secure connection for transferring sensitive information. The most popular terminal emulator PuTTY Download is a free serial console, terminal emulator, and the most popular SSH customer. Created by Simon Tatham, this is now maintained by developers from around the world. It offers a command-line interface that you can customize according to your requirements. The cross-platform software is available with source code and can also be downloaded on Mac devices.