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PuTTY

An SSH, Telnet, and serial client for Windows and Unix with a built-in terminal emulator. Its emulator predates most modern extensions and is configured per session rather than by a single global file.

Identity

  • TERM: xterm by default; the "Terminal-type string" setting in Connection ▸ Data changes it.
  • TERM_PROGRAM: not set.
  • Answerback (ENQ): configurable, default PuTTY.
  • DA1: CSI ? 6 c (VT102 class) ?.
  • XTVERSION: not supported.

Documentation

Notable behavior

  • Supports 256 colors and, since 0.71, 24-bit color.
  • Bracketed paste, the alternate screen (configurable), and xterm mouse reporting including the SGR encoding are supported.
  • Several classic behaviors are configuration options: "Disable switching to alternate terminal screen", "Disable remote-controlled window title changing", "Disable remote-controlled character set configuration", "Response to remote title query" (which defaults to an empty string as a security measure).
  • Does not implement OSC 8 hyperlinks, OSC 52, graphics, or the Kitty keyboard protocol.
  • Function-key and keypad encodings follow a "Function keys and keypad" setting with several modes (ESC[n~, Linux, Xterm R6, VT400, VT100+, SCO); the default is ESC[n~, which matches xterm for F1–F4 only in the "Xterm R6" mode.

Version notes

0.xx numbering; the Changes page lists terminal-related changes.

Probe

tools/query '\033[c'
tools/query '\005'       # ENQ answerback

Feature support

Records are maintained independently in tdn/terminals/putty.yaml. Unlisted features are unknown. See the comparison for all features.

FeatureSupportAs ofNotes and evidence
BEL urgency/visual
c0-bel-attention		SupportedImported · unverifiedUnversionedYes

import

18 size in cells
csi-18-t-text-size		SupportedImported · unverifiedUnversionedYes

import

21 title report
csi-21-t-title-report		SupportedImported · unverifiedUnversionedGated

import

Move/resize (3,4,8)
csi-3-4-8-t-move-resize		SupportedImported · unverifiedUnversionedGated

import

DECSTBM
csi-decstbm		SupportedImported · unverifiedUnversionedYes

import

ED/EL/ECH/ICH/DCH/IL/DL
csi-editing-operations		SupportedImported · unverifiedUnversionedYes

import

SU/SD
csi-su-sd-scroll		SupportedImported · unverifiedUnversionedYes

import

DECRQSS
dcs-decrqss		UnknownImported · unverifiedUnversioned?; not listed in the manual

import

1000 mouse
dec-mode-1000-mouse		SupportedImported · unverifiedUnversionedYes

import

1002 button motion
dec-mode-1002-button-motion		SupportedImported · unverifiedUnversionedYes

import

1004 focus
dec-mode-1004-focus		UnknownImported · unverifiedUnversioned? ([PuTTY documentation, Terminal panel](https://the.earth.li/~sgtatham/putty/latest/htmldoc/Chapter4.html).)

import

1006 sgr mouse
dec-mode-1006-sgr-mouse		SupportedImported · unverifiedUnversionedYes

import

1049 alternate screen
dec-mode-1049-alternate-screen		SupportedImported · unverifiedUnversionedYes

import

2004 bracketed paste
dec-mode-2004-bracketed-paste		SupportedImported · unverifiedUnversionedYes | Also recorded: Yes; Enabled by default since 0.63 ([PuTTY changes, 0.63](https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html).)

import import

win32-input-mode
dec-mode-9001-win32-input		UnknownImported · unverifiedUnversioned?; Not a Unix protocol; not documented by any of them

import

OSC 0/2 set
osc-0-2-title		SupportedImported · unverifiedUnversionedYes

import

OSC 52 read
osc-52-read		UnknownImported · unverifiedUnversioned?; Not implemented

import

OSC 52 write
osc-52-write		UnknownImported · unverifiedUnversioned?; Not implemented

import

256 colors
sgr-256-colors		SupportedImported · unverifiedUnversionedYes

import

Truecolor 38;2
sgr-38-2-truecolor		SupportedImported · unverifiedUnversionedYes (0.71+)

import

Blink 5
sgr-5-blink		SupportedImported · unverifiedUnversionedYes

import

bce
terminfo-bce		SupportedImported · unverifiedUnversionedYes

import