noVNC

VNC client using HTML5 (WebSockets, Canvas)

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noVNC: HTML VNC Client Library and Application

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Description

noVNC is both a HTML VNC client JavaScript library and an application built on
top of that library. noVNC runs well in any modern browser including mobile
browsers (iOS and Android).

Many companies, projects and products have integrated noVNC including
OpenStack,
OpenNebula,
LibVNCServer, and
ThinLinc. See
the Projects and Companies wiki page
for a more complete list with additional info and links.

Table of Contents

News/help/contact

The project website is found at novnc.com.
Notable commits, announcements and news are posted to
@noVNC.

If you are a noVNC developer/integrator/user (or want to be) please join the
noVNC discussion group.

Bugs and feature requests can be submitted via
github issues. If you have questions
about using noVNC then please first use the
discussion group.
We also have a wiki with lots of
helpful information.

If you are looking for a place to start contributing to noVNC, a good place to
start would be the issues that are marked as
"patchwelcome".
Please check our
contribution guide though.

If you want to show appreciation for noVNC you could donate to a great non-
profits such as:
Compassion International,
SIL,
Habitat for Humanity,
Electronic Frontier Foundation,
Against Malaria Foundation,
Nothing But Nets, etc.
Please tweet @noVNC if you do.

Features

  • Supports all modern browsers including mobile (iOS, Android)
  • Supported VNC encodings: raw, copyrect, rre, hextile, tight, tightPNG
  • Supports scaling, clipping and resizing the desktop
  • Local cursor rendering
  • Clipboard copy/paste
  • Translations
  • Licensed mainly under the MPL 2.0, see
    the license document for details

Screenshots

Running in Firefox before and after connecting:

 

See more screenshots
here.

Browser Requirements

noVNC uses many modern web technologies so a formal requirement list is
not available. However these are the minimum versions we are currently
aware of:

  • Chrome 49, Firefox 44, Safari 11, Opera 36, IE 11, Edge 12

Server Requirements

noVNC follows the standard VNC protocol, but unlike other VNC clients it does
require WebSockets support. Many servers include support (e.g.
x11vnc/libvncserver,
QEMU, and
MobileVNC), but for the others you need to
use a WebSockets to TCP socket proxy. noVNC has a sister project
websockify that provides a simple such
proxy.

Quick Start

  • Use the launch script to automatically download and start websockify, which
    includes a mini-webserver and the WebSockets proxy. The --vnc option is
    used to specify the location of a running VNC server:

    ./utils/launch.sh --vnc localhost:5901

  • Point your browser to the cut-and-paste URL that is output by the launch
    script. Hit the Connect button, enter a password if the VNC server has one
    configured, and enjoy!

Installation from Snap Package

Running the command below will install the latest release of noVNC from Snap:

sudo snap install novnc

Running noVNC

You can run the Snap-package installed novnc directly with, for example:

novnc --listen 6081 --vnc localhost:5901 # /snap/bin/novnc if /snap/bin is not in your PATH

Running as a Service (Daemon)

The Snap package also has the capability to run a 'novnc' service which can be
configured to listen on multiple ports connecting to multiple VNC servers
(effectively a service runing multiple instances of novnc).
Instructions (with example values):

List current services (out-of-box this will be blank):

sudo snap get novnc services
Key             Value
services.n6080  {...}
services.n6081  {...}

Create a new service that listens on port 6082 and connects to the VNC server
running on port 5902 on localhost:

sudo snap set novnc services.n6082.listen=6082 services.n6082.vnc=localhost:5902

(Any services you define with 'snap set' will be automatically started)
Note that the name of the service, 'n6082' in this example, can be anything
as long as it doesn't start with a number or contain spaces/special characters.

View the configuration of the service just created:

sudo snap get novnc services.n6082
Key                    Value
services.n6082.listen  6082
services.n6082.vnc     localhost:5902

Disable a service (note that because of a limitation in Snap it's currently not
possible to unset config variables, setting them to blank values is the way
to disable a service):

sudo snap set novnc services.n6082.listen='' services.n6082.vnc=''

(Any services you set to blank with 'snap set' like this will be automatically stopped)

Verify that the service is disabled (blank values):

sudo snap get novnc services.n6082
Key                    Value
services.n6082.listen  
services.n6082.vnc

Integration and Deployment

Please see our other documents for how to integrate noVNC in your own software,
or deploying the noVNC application in production environments:

  • Embedding - For the noVNC application
  • Library - For the noVNC JavaScript library

Authors/Contributors

See AUTHORS for a (full-ish) list of authors. If you're not on
that list and you think you should be, feel free to send a PR to fix that.

  • Core team:

  • Notable contributions:

    • UI and Icons : Pierre Ossman, Chris Gordon
    • Original Logo : Michael Sersen
    • tight encoding : Michael Tinglof (Mercuri.ca)
  • Included libraries:

    • base64 : Martijn Pieters (Digital Creations 2), Samuel Sieb (sieb.net)
    • DES : Dave Zimmerman (Widget Workshop), Jef Poskanzer (ACME Labs)
    • Pako : Vitaly Puzrin (https://github.com/nodeca/pako)

Do you want to be on this list? Check out our
contribution guide and
start hacking!

Main metrics

Overview
Name With Ownernovnc/noVNC
Primary LanguageJavaScript
Program languageJavaScript (Language Count: 6)
Platform
License:Other
所有者活动
Created At2010-04-07 01:55:44
Pushed At2025-05-07 10:33:43
Last Commit At2025-05-07 12:32:11
Release Count22
Last Release Namev1.6.0 (Posted on 2025-03-12 20:26:26)
First Release Namev0.1 (Posted on )
用户参与
Stargazers Count12.7k
Watchers Count319
Fork Count2.5k
Commits Count2.6k
Has Issues Enabled
Issues Count1356
Issue Open Count63
Pull Requests Count328
Pull Requests Open Count16
Pull Requests Close Count250
项目设置
Has Wiki Enabled
Is Archived
Is Fork
Is Locked
Is Mirror
Is Private