PuTTY

{{short description|Free and open-source terminal emulator, serial console and network file transfer application}}

{{About|the computer software|the sealing material|Putty|other uses|Putty (disambiguation)}}

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{{Infobox software

| name = PuTTY

| logo = PuTTY Icon upstream.svg

| screenshot = PuTTY Ubuntu.png

| caption = A screenshot of PuTTY running under Ubuntu MATE

| developer = Simon Tatham

| released = {{Start date and age|1999|01|08}}{{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}}

| 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{{cite web |url=https://www.chiark.greenend.org.uk/~sgtatham/putty/licence.html |title=PuTTY Licence|access-date=2021-03-08}}

| website = {{URL|https://www.chiark.greenend.org.uk/~sgtatham/putty/}}

}}

File:PuTTY_User_Manual.pdf

PuTTY ({{IPAc-en|ˈ|p|ʌ|t|i|}}){{Cite web|url=https://www.chiark.greenend.org.uk/~sgtatham/putty/faq.html#faq-pronounce|title=PuTTY FAQ|website=www.chiark.greenend.org.uk}} 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.{{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 }}

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,{{Cite web|url=https://s2putty.sourceforge.net/|title=PuTTY for Symbian OS|website=s2putty.sourceforge.net}}{{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}} 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).{{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}} 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.{{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}}

PuTTY does not support session tabs directly,{{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}} but many wrappers are available that do.(e.g. [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)]).

History

PuTTY development began in 1996,{{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}} and was a usable SSH-2 client by October 2000.{{Cite web|url=https://www.chiark.greenend.org.uk/~sgtatham/putty/faq.html#faq-ssh2|title=PuTTY FAQ|website=www.chiark.greenend.org.uk}}{{Cite web|url=https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html|title=PuTTY Change Log|website=www.chiark.greenend.org.uk}}