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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2022-07-05 FTP downloads withdrawn

Our host machine is not running an FTP server any more, so we've withdrawn the alternative FTP URLs on our download pages.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 08:57:17 2022)