PuTTY is an SSH and telnet client, developed originally by Simon Tatham for the Windows platform. PuTTY is a communications tool for running interactive command-line sessions on other computers, usually via the SSH protocol. It can also communicate over a serial port, or speak various legacy … Download PuTTY for Windows operating system. Step by step guide to using SSH in PuTTY. Free download putty for Mac and Linux. Latest version Putty 0.83 is available here. PuTTY is a free software SSH client for Windows and also Unix, including an xterm -style terminal emulator. It is written and maintained primarily by Simon Tatham. PuTTY is an SSH and Telnet client for Windows. Download the latest release here, with installation and SSH key setup instructions. PuTTY is only available for Windows and Unix-based OS. As of version 0.68, PuTTY executables run on versions of Windows from XP onwards, up to and including Windows 11. Dec 1, 2025 · Putty is a free and open‑source terminal emulator and SSH/Telnet client widely trusted by IT professionals, developers, and system administrators.