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((Short description|Remote desktop software application))
((More citations needed|date=August 2008))
((Infobox software
| name                   = TightVNC
| logo                   = TightVNC logo.png
| logo size              = 64px
| screenshot             = 
| caption                = 
| author                 = 
| developer              = 
| released               = v1.0 / ((Start date and age|2001))<ref>((cite web|url=http://freshmeat.sourceforge.net/projects/tightvnc/releases?page=3|title=All releases of TightVNC - Freecode))</ref>
| latest release version = Linux: 1.3.10; Windows: 2.8.81
| latest release date    = ((Start date and age|2023|05|04))
| programming language   = [[C (programming language)|C]], [[C++]], [[Java (programming language)|Java]]<ref name="SourceForge">((cite web|url=http://sourceforge.net/projects/vnc-tight/|title=SourceForge.net: TightVNC))</ref>
| operating system       = [[Microsoft Windows]], [[Linux]]
| platform               = 
| language               = [[English language|English]]<ref name="SourceForge"/>
| genre                  = [[Remote administration]]
| license                = [[GNU General Public License|GPL-2.0-or-later]]
| website                = ((URL|https://tightvnc.com/))
))

'''TightVNC''' is a [[Free and open-source software|free and open-source]] [[remote desktop software]] server and client application for [[Linux]] and [[Windows]]. A server for [[macOS]] is available under a [[commercial software|commercial]] source code license only, without SDK or binary version provided.<ref>[https://tightvnc.com/licensing-server-macos.php Server for macOS]</ref> Constantin Kaplinsky developed TightVNC,<ref>((cite book
 | last1            = Wolf
 | first1           = Chris
 | chapter          = 4: Monitoring and Diagnostic Tools
 | title            = Troubleshooting Microsoft Technologies: The Ultimate Administrator's Repair Manual
 | url              = https://books.google.com/books?id=O_hnDWNbOz0C
 | series           = The Addison-Wesley Microsoft Technology Series
 | location         = Boston
 | publisher        = Addison-Wesley Professional
 | date = 2003
 | page             = 121
 | isbn             = 9780321133458
 | access-date      = 2017-03-22
 | quote            = TightVNC (www.tightvnc.com) is an improved version of AT&T's Virtual Network Computing (VNC) Viewer that was spearheaded by Constantin Kaplinsky.))</ref> using and extending the [[RFB protocol]] of [[Virtual Network Computing]] (VNC) to allow end-users to control another computer's screen remotely.

==Encodings==
TightVNC uses so-called "tight encoding" of areas, which improves performance over low bandwidth connection. It is effectively a combination of the [[JPEG]] and [[zlib]] compression mechanisms.<ref>((cite web|publisher=Fedora Project|url=http://fedoraproject.org/wiki/Features/TightVNC|title=TightVNC))</ref><ref>((cite web|publisher=TightVNC|url=http://tightvnc.org/compare.html|title=Comparison Results|archive-url=https://web.archive.org/web/20040313034148/http://www.tightvnc.org/compare.html|archive-date=2004-03-13))</ref> It is possible to watch videos and play DirectX games through TightVNC over a broadband connection, albeit at a low frame rate.((Citation needed|date=August 2008))

TightVNC includes many other common features of VNC derivatives, such as file transfer capability.

==Compatibility==
TightVNC is cross-compatible with other client and server implementations of VNC; however, tight encoding is not supported by most other implementations, so it is necessary to use TightVNC at both ends to gain the full advantage of its enhancements.<ref>((cite web|url=http://tightvnc.com/intro.html|title=Introduction to TightVNC))</ref>

Among notable enhancements are file transfers, support for the DemoForge DFMirage mirror driver (a type of virtual display driver) to detect screen updates (saves CPU time and increases the performance of TightVNC), ability to zoom the picture and automatic SSH tunneling on Unix.

Since the 2.0 beta, TightVNC supports auto scaling, which resizes the viewer window to the remote users desktop size, regardless of the resolution of the host computer.((Citation needed|date=February 2015))

TightVNC 1.3.10, released in March 2009, is the last version to support Linux/Unix.<ref>((cite web|url=https://lwn.net/Articles/322943/|title=TightVNC: 1.3.10 released (SourceForge)))</ref> This version is still often used in guides to set up VNC for Linux.<ref>((cite web|url=https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-vnc-on-ubuntu-20-04|title=How to Install and Configure VNC on Ubuntu 20.04))</ref><ref>((cite web|url=https://www.techrepublic.com/article/how-to-install-a-vnc-server-on-linux/|title=How to install a VNC server on Linux))</ref>

==Derived software==

===RemoteVNC===
RemoteVNC is a fork of the TightVNC project and adds automatic traversal of [[Network Address Translation|NAT]] and [[Firewall (computing)|firewalls]] using [[Jingle (protocol)|Jingle]]. It requires a GMail account.

===TightVNC Portable Edition===
The developers have also produced a [[Portable application|portable]] version of the software,<ref>((cite web|url=http://www.tightvnc.com/download-old.php|title=TightVNC Portable Edition))</ref> available as both [[U3 (software)|U3]] and standalone downloads.

===TurboVNC===
[[VirtualGL#TurboVNC|TurboVNC]] is based on the TightVNC 1.3.x, xf4vnc, X.org, and TigerVNC code bases and includes numerous performance enhancements and features targeted at 3D and video workloads.<ref>((cite web|url=http://www.turbovnc.org/Documentation/Documentation/|title=User's Guide for TurboVNC))</ref><ref>((cite web |title=What About TigerVNC? |url=https://turbovnc.org/About/TigerVNC |website=turbovnc.org))</ref>

===TigerVNC===
[[TigerVNC]] is VNC server and client software, started as a fork of TightVNC in 2009, after three years of inactivity in TightVNC trunk. It also takes some code from TurboVNC.<ref name=astrand>((cite web |url=https://lwn.net/Articles/321483/ |title=Open Letter: Leaving TightVNC, Founding TigerVNC |last=Åstrand |first=Peter |date=2009-02-27 |work=TightVNC mailing list |accessdate=2014-02-10))</ref>

==See also==
((Portal|Free and open-source software))
* [[Comparison of remote desktop software]]
* [[RFB protocol]]

==References==
((Reflist))

==External links==
* ((Official website))
* ((SourceForge|vnc-tight|TightVNC))
* ((Citation|url=http://sourceforge.net/mailarchive/forum.php?thread_name=alpine.LFD.2.00.0902271116020.25749@maggie.lkpg.cendio.se&forum_name=tigervnc-users|title=''TigerVNC fork announcement''|date=2009-02-27|archive-url=https://web.archive.org/web/20121108193955/http://sourceforge.net/mailarchive/forum.php?thread_name=alpine.LFD.2.00.0902271116020.25749@maggie.lkpg.cendio.se&forum_name=tigervnc-users|archive-date=2012-11-08))

((FLOSS))
((Remote administration software))

((DEFAULTSORT:Tightvnc))
[[Category:Cross-platform software]]
[[Category:Free network-related software]]
[[Category:Free software programmed in C]]
[[Category:Free software programmed in C++]]
[[Category:Free software programmed in Java (programming language)]]
[[Category:Portable software]]
[[Category:Remote desktop]]
[[Category:Remote desktop software for Linux]]
[[Category:Virtual Network Computing]]

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