We also publish the latest PuTTY installers for all Windows architectures as a free-of-charge download at the Microsoft Store; they usually take a few days to appear there after we release them.

Aug 14, 2025 · PuTTY is a free implementation of SSH and Telnet for Windows and Unix platforms, along with an xterm terminal emulator. It is written and maintained primarily by Simon Tatham.

We also publish the latest PuTTY installers for all Windows architectures as a free-of-charge download at the Microsoft Store; they usually take a few days to appear there after we release them.

May 8, 2021 · Past releases of PuTTY are versions we thought were reasonably likely to work well, at the time they were released. However, later releases will almost always have fixed bugs and/or …

This page contains download links for the latest development snapshot of PuTTY. The development snapshots are built every day, automatically, from the current development code – in whatever state …

The existing PuTTY licence document already gives you permission to use or distribute PuTTY in pretty much any way which does not involve pretending you wrote it or suing us if it goes wrong.

Downloadable documentation Zipped HTML: puttydoc.zip Plain text: puttydoc.txt Windows HTML Help: putty.chm

Feb 8, 2025 · The DES, MD5, SHA, and CRC32 implementations used in PuTTY are now all written by me and distributable under the PuTTY licence, instead of being borrowed from a variety of other places.

Several pieces of third-party software incorporate parts of the PuTTY code, or augment PuTTY in other ways, to provide facilities not available from PuTTY itself.

About me: some idea of who I am. Free software I've written, which you can download. PuTTY: an SSH client for Windows, also able to talk to serial ports and speak older insecure protocols like Telnet.