Download PuTTY: release 0.51

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This page contains download links for PuTTY release 0.51.

0.51, released on 2000-12-14, is not the latest release. See the Latest Release page for the most up-to-date release (currently 0.71).

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 added new features. If you have a problem with this release, please try the latest release, to see if the problem has already been fixed.


This release has known security vulnerabilities. Consider using a later release instead, such as the latest version, 0.71.

The known vulnerabilities in this release are:

Binary files

putty.exe (the SSH and Telnet client itself)
x86: putty.exe (or by FTP)
Alpha: putty-alpha.exe (or by FTP)
pscp.exe (an SCP client, i.e. command-line secure file copy)
x86: pscp.exe (or by FTP)
Alpha: pscp-alpha.exe (or by FTP)
puttytel.exe (a Telnet-only client)
x86: puttytel.exe (or by FTP)
Alpha: puttytel-alpha.exe (or by FTP)
plink.exe (a command-line interface to the PuTTY back ends)
x86: plink.exe (or by FTP)
Alpha: plink-alpha.exe (or by FTP)
pageant.exe (an SSH authentication agent for PuTTY, PSCP, PSFTP, and Plink)
x86: pageant.exe (or by FTP)
Alpha: pageant-alpha.exe (or by FTP)
puttygen.exe (a RSA and DSA key generation utility)
x86: puttygen.exe (or by FTP)
Alpha: puttygen-alpha.exe (or by FTP)

Source code

Windows source archive
.zip: (or by FTP)
git repository
gitweb: master | 0.51 release tag

Checksum files

Cryptographic checksums for all the above files
MD5: md5sums (or by FTP)

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(last modified on Wed Mar 20 00:43:00 2019)