VNC client using HTML5 (Web Sockets, Canvas) with encryption (wss://) support.
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noVNC: HTML5 VNC Client


noVNC is a HTML5 VNC client that runs well in any modern browser including mobile browsers (iPhone/iPad and Android).

noVNC is licensed under the LGPLv3.

There are many companies/projects that have integrated noVNC into their products including: Sentry Data Systems, Ganeti Web Manager, Archipel, openQRM, OpenNode, OpenStack, Broadway (HTML5 GDK/GTK+ backend), OpenNebula, CloudSigma, Zentyal (formerly eBox), and SlapOS. See this wiki page for more info and links.

Notable commits, announcements and news are posted to @noVNC


Running in Chrome before and after connecting:


See more screenshots here.

Browser Requirements

  • HTML5 Canvas (with createImageData): Chrome, Firefox 3.6+, iOS Safari, Opera 11+, Internet Explorer 9+, etc.

  • HTML5 WebSockets: For browsers that do not have builtin WebSockets support, the project includes web-socket-js, a WebSockets emulator using Adobe Flash. iOS 4.2+ has built-in WebSocket support.

  • Fast Javascript Engine: this is not strictly a requirement, but without a fast Javascript engine, noVNC might be painfully slow.

  • I maintain a more detailed browser compatibility list here.

Server Requirements

Unless you are using a VNC server with support for WebSockets connections (such as x11vnc/libvncserver), you need to use a WebSockets to TCP socket proxy. There is a python proxy included ('websockify'). One advantage of using the proxy is that it has builtin support for SSL/TLS encryption (i.e. "wss://").

Quick Start

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

    ./utils/ --vnc localhost:5901

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

Other Pages