{{Short description|Terminal emulator and file transfer program}} {{About|the computer software|the sealing material|Putty|other uses|Putty (disambiguation)}} {{multiple issues| {{Primary sources|date=October 2008}} {{Refimprove|date=July 2011}} }} {{Infobox software | name = PuTTY | logo = PuTTY Icon upstream.svg | logo size = 64 | screenshot = PuTTY Ubuntu.png | caption = A screenshot of PuTTY running under Ubuntu MATE | developer = Simon Tatham | released = {{Start date and age|1999|01|08}}<ref name=git>{{Cite web|url=https://git.tartarus.org/?p=simon%2Fputty.git%3Ba%3Dcommit%3Bh%3Dc74130d423fd83a65c51b7634e3c34aaf557ae68|title=git.tartarus.org Git - simon/putty.git/commit|website=git.tartarus.org|access-date=31 August 2017|archive-date=21 September 2021|archive-url=https://web.archive.org/web/20210921140141/https://git.tartarus.org/?p=simon%2Fputty.git%3Ba%3Dcommit%3Bh%3Dc74130d423fd83a65c51b7634e3c34aaf557ae68|url-status=dead}}</ref> | latest release version = {{wikidata|property|preferred|references|edit|Q841685|P348|P548=Q2804309}} | latest release date = {{wikidata|qualifier|preferred|single|Q841685|P348|P548=Q2804309|P577}} | latest preview version = {{wikidata|property|preferred|references|edit|Q841685|P348|P548=Q51930650}} | latest preview date = {{wikidata|qualifier|preferred|single|Q841685|P348|P548=Q51930650|P577}} | operating system = Microsoft Windows, ReactOS, macOS, Linux | programming language = C | genre = Terminal emulator | license = MIT License<ref name=license>{{cite web |url=https://www.chiark.greenend.org.uk/~sgtatham/putty/licence.html |title=PuTTY Licence|access-date=2021-03-08}}</ref> | website = {{URL|https://putty.software/}} {{URL|https://www.chiark.greenend.org.uk/~sgtatham/putty/}} }}
'''PuTTY''' ({{IPAc-en|ˈ|p|ʌ|t|i|}})<ref>{{Cite web|url=https://www.chiark.greenend.org.uk/~sgtatham/putty/faq.html#faq-pronounce|title=PuTTY FAQ|website=www.chiark.greenend.org.uk}}</ref> is a free and open-source terminal emulator, serial console and network file transfer application. It supports several network protocols, including SCP, SSH, Telnet, rlogin, and raw socket connection. It can also connect to a serial port. The name "PuTTY" has no official meaning.<ref>{{cite web |quote = [PuTTY is] the name of a popular SSH and Telnet client. Any other meaning is in the eye of the beholder. It's been rumoured that ‘PuTTY’ is the antonym of ‘getty’, or that it's the stuff that makes your Windows useful, or that it's a kind of plutonium Teletype. We couldn't possibly comment on such allegations. |url = https://www.chiark.greenend.org.uk/~sgtatham/putty/faq.html#faq-meaning |title = PuTTY FAQ }}</ref>
PuTTY was originally written for Microsoft Windows, but it has been ported to various other operating systems. Official ports are available for some Unix-like platforms, with work-in-progress ports to {{nowrap|Classic Mac OS}} and {{nowrap|macOS}}, and unofficial ports have been contributed to platforms such as Symbian,<ref>{{Cite web|url=https://s2putty.sourceforge.net/|title=PuTTY for Symbian OS|website=s2putty.sourceforge.net}}</ref><ref>{{cite web|url=http://wiki.forum.nokia.com/index.php/PuTTY_for_symbian_OS|title=Forum Nokia Wiki – PuTTY for Symbian OS|archive-url=https://archive.today/20120716084848/http://wiki.forum.nokia.com/index.php/PuTTY_for_symbian_OS|archive-date=2012-07-16}}</ref> Windows Mobile and Windows Phone.
PuTTY was written and is maintained primarily by Simon Tatham, a British programmer.
==Features== PuTTY supports many variations on the secure remote terminal, and provides user control over the SSH encryption key and protocol version, alternate ciphers such as AES, 3DES, RC4, Blowfish, DES, and public-key authentication. PuTTY uses its own format of key files – PPK (protected by ''Message Authentication Code'').<ref name="PPK">{{cite news|url=http://blog.danyll.com/ssh-and-transfer-files-using-putty-private-key-ppk/|title=SSH and Transfer Files using Putty Private Key (.ppk)|newspaper=D4Nyll |date=21 June 2016 |archive-url=https://web.archive.org/web/20210518105614/http://blog.danyll.com/ssh-and-transfer-files-using-putty-private-key-ppk/|archive-date=2021-05-18}}</ref> PuTTY supports SSO through GSSAPI, including user provided GSSAPI DLLs. It also can emulate control sequences from xterm, VT220, VT102 or ECMA-48 terminal emulation, and allows local, remote, or dynamic port forwarding with SSH (including X11 forwarding). The network communication layer supports IPv6, and the SSH protocol supports the zlib@openssh.com delayed compression scheme. It can also be used with local serial port connections.
PuTTY comes bundled with command-line SCP and SFTP clients, called "pscp" and "psftp" respectively, and plink, a command-line connection tool, used for non-interactive sessions.<ref>{{cite book|title=SSH, The Secure Shell: The Definitive Guide|last1=Barrett|first1=Daniel|last2=Silverman|first2=Richard|last3=Byrnes|first3=Robert|publisher=O'Reilly Media|isbn=9780596008956|date=2005|pages=577–579|url=https://books.google.com/books?id=3XzIFG3w8-YC&pg=PT594}}</ref>
PuTTY does not support session tabs directly,<ref>{{Cite web|url=https://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/multiple-connections.html|title=PuTTY wish multiple-connections|website=www.chiark.greenend.org.uk}}</ref> but many wrappers are available that do.<ref>e.g. [https://web.archive.org/web/20090912063712/http://puttycm.free.fr/cms/index.php?option=com_content&view=category&layout=blog&id=41&Itemid=55 PuTTY Connection Manager], [https://github.com/jimradford/superputty SuperPuTTY], [https://ttyplus.com/multi-tabbed-putty/ MTPuTTY], [https://mremoteng.org/ mRemoteNG], [https://winsshterm.blogspot.com/ WinSSHTerm], [https://sourceforge.net/projects/puttymanager/ PuTTY Manager], [https://www.raisin.de/putty-tabs/putty-tabs.html PuttyTabs] or [https://spoox.org/projects/twsc/ TWSC (Terminal Window ShortCuts)].</ref>
==History== PuTTY development began in 1996,<ref>{{cite web |url=https://www.chiark.greenend.org.uk/~sgtatham/quasiblog/putty-icons/ |last=Tatham |first=Simon |title= Iconography of the PuTTY tools |date=March 12, 2025}}</ref> and was a usable SSH-2 client by October 2000.<ref>{{Cite web|url=https://www.chiark.greenend.org.uk/~sgtatham/putty/faq.html#faq-ssh2|title=PuTTY FAQ|website=www.chiark.greenend.org.uk}}</ref><ref>{{Cite web|url=https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html|title=PuTTY Change Log|website=www.chiark.greenend.org.uk}}</ref>
==Components== PuTTY consists of several components: ; PuTTY: the Telnet, rlogin, and SSH client itself, which can also connect to a serial port ; PSCP: an SCP client, i.e. command-line secure file copy. Can also use SFTP to perform transfers ; PSFTP: an SFTP client, i.e. general file transfer sessions much like FTP ; PuTTYtel: a Telnet-only client ; Plink: a command-line interface to the PuTTY back ends. Usually used for SSH Tunneling ; Pageant: an SSH authentication agent for PuTTY, PSCP and Plink ; PuTTYgen: an RSA, DSA, ECDSA and EdDSA key generation utility ; pterm: (Unix version only) an X11 client which supports the same terminal emulation as PuTTY
==See also== {{Portal|Free and open-source software}} *Comparison of SSH clients *Tera Term *mintty *WinSCP *minicom
==References== * PuTTY user manual (copy from 2022) {{Reflist}}
==External links== {{Commons category|PuTTY}} *{{official website}} *[https://www.chiark.greenend.org.uk/~sgtatham/putty/ Original project website]
{{Terminal emulator}} {{Cryptographic software}} {{FLOSS}} {{Use dmy dates|date=June 2020}}
{{DEFAULTSORT:Putty}} Category:1998 software Category:Cross-platform free software Category:Cryptographic software Category:Free communication software Category:Free software programmed in C Category:Free terminal emulators Category:Portable software Category:Secure Shell Category:SSH File Transfer Protocol clients Category:Software using the MIT license Category:Symbian software Category:Telnet