PuTTY: a free SSH and Telnet client

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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.

The latest version is 0.78.
Download it here.

LEGAL WARNING:
Use of PuTTY, PSCP, PSFTP and Plink is illegal in countries where
encryption is outlawed. We believe it is legal to use PuTTY, PSCP,
PSFTP and Plink in England and Wales and in many other countries, but
we are not lawyers, and so if in doubt you should seek legal advice
before downloading it. You may find useful information at
cryptolaw.org, which collects
information on cryptography laws in many countries, but we
can’t vouch for its correctness.

Use of the Telnet-only binary (PuTTYtel) is unrestricted by any
cryptography laws.

Latest news

2022-10-29 PuTTY 0.78 released

PuTTY 0.78, released today, is a feature release. Its major new
feature is support for OpenSSH’s certificate system. PuTTY can now
present certified user keys to an SSH server, and you can configure
one or more trusted CAs so that it will automatically accept host keys
signed by them.

Other new features include new forms of SSH jump host support (you can
tell the proxy SSH server to run a command to make the connection);
additional cryptography (the hopefully quantum-proof NTRU Prime key
exchange, updated GSSAPI key exchange method list, new integer
Diffie-Hellman groups, and AES-GCM); and a system that allows a
third-party helper program to provide answers to keyboard-interactive
authentication questions (e.g. for automating one-time password
schemes).

0.78 also fixes a bug when setting the window title in some character
sets, and restores Windows XP support, which broke in 0.77.

Note to upgrading Windows users: the 0.78 Windows installer will
not uninstall 0.77 or older. We recommend uninstalling the
older version first. If you’ve ended up with both, uninstalling both
copies and then running the new installer will put everything right.
This is a knock-on effect of a bugfix; sorry about that.

2022-09-13 Pre-releases of 0.78 now available

We’re working towards a 0.78 release. Pre-release builds are available, and we’d appreciate people testing
them and reporting any issues.

2022-07-05 FTP downloads withdrawn

Our host machine is not running an FTP server any more, so we’ve
withdrawn the alternative FTP URLs on our download pages. We recommend
that everybody download PuTTY over HTTPS, which is more secure in any
case.

If this is a serious inconvenience for anyone, please let us
know, and we’ll see what we can do about it.

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(last modified on Sat Oct 29 08:57:11 2022 )