UltraVNC

Name: UltraVNC
Author: UltraVNC

Free plan Self-hostedWindows

What UltraVNC is

UltraVNC is free remote-access software for Windows. Its Server and Viewer let a user view and remotely control another computer with a mouse and keyboard, and the software includes file transfer. A text chat feature uses the current VNC connection, though its text is lost when the chat window closes. Optional DSM encryption secures Viewer-to-Server communications; the SecureVNC plugin’s default configuration uses 2048-bit RSA and 256-bit AES keys. UltraVNC says it works with RealVNC, TightVNC, and most other VNC variants that follow the RFB protocol. Its Repeater can proxy connections between a Viewer and Server behind separate firewalls or routers. UltraVNC SC is a customizable, preconfigured small server that a customer can run without installing software or using the registry. The site also describes an embedded JavaViewer that can connect to an UltraVNC Server and transfer files from a browser on systems supporting Java, including Linux and Mac OS. The project began in 2002 and is distributed under the GNU General Public License, free for all uses including commercial use.

Who it suits

UltraVNC suits help desks, IT departments, remote support companies, classrooms, and individuals helping friends or relatives on Windows systems. It may also suit people demonstrating remotely or connecting through a VNC-compatible setup.

What it does well

Free for all uses, including commercial use.
Supports remote viewing, control, and file transfer.
Repeater can proxy connections across separate firewalls or routers.
Compatible with several VNC variants that follow RFB.

What to know first

Supported platforms listed are Windows-focused.
Chat text is lost when its window closes.

Plans

Plan	Billed and limits	Price
UltraVNC	Free for all uses, including commercial use · Windows focused	Free

As uvnc.com lists them, read 11 Oct 2026. The maker's own page has the final word.

Getting started

Visit https://uvnc.com/.
Use the UltraVNC Server and Viewer components to establish remote access.
For a connection across separate firewalls or routers, use the Repeater.
For customer support without installation or registry use, consider UltraVNC SC.
For browser access on systems supporting Java, use the embedded JavaViewer.

Verdict

UltraVNC pairs Windows remote control with file transfer and several connection options. Consider its Windows focus and chat limitation when deciding whether it fits your setup.

Questions

Is UltraVNC free?

Yes. It is distributed under the GNU General Public License and is free for all uses, including commercial use.

Which platforms does UltraVNC support?

The supported platform listed for the software is Windows. The site also says its JavaViewer can connect through a browser on systems supporting Java, including Linux and Mac OS.

Can UltraVNC transfer files?

Yes. File transfer is included, and the embedded JavaViewer can transfer files from a browser on systems supporting Java.

Does UltraVNC include chat?

Yes. It has text chat over the current VNC connection, but chat text is lost when the chat window closes.

Does UltraVNC support encryption?

Optional DSM encryption secures Viewer-to-Server communications. The SecureVNC plugin’s default configuration uses 2048-bit RSA and 256-bit AES keys.

Who makes UltraVNC, and when did the project begin?

The maker is UltraVNC. The project says it began in 2002 and names Rudi De Vos and Ludovic Bocquet as its team members.

Facts from UltraVNC's own pages

Access mode: both · uvnc.com, 20 Sept 2026
Chat: UltraVNC includes text chat that uses the current VNC connection; chat text is lost when the chat window is closed. · uvnc.com, 11 Oct 2026
Encryption: Optional DSM encryption secures Viewer-to-Server communications, and the SecureVNC plugin’s default configuration uses 2048-bit RSA and 256-bit AES keys. · uvnc.com, 11 Oct 2026
File transfer: The Viewer and Server can transfer files and complete folders, with files compressed before transfer. · uvnc.com, 11 Oct 2026
Founded: 2002 · uvnc.com, 28 Sept 2026
Free plan: Yes · uvnc.com, 20 Sept 2026
Intended users: The site identifies help desks, IT departments, remote support companies, people demonstrating remotely, classrooms, and individuals helping friends or relatives as intended users. · uvnc.com, 11 Oct 2026
Java viewer: The site says its embedded JavaViewer can connect to an UltraVNC Server and transfer files from a browser on systems supporting Java, including Linux and Mac OS. · uvnc.com, 11 Oct 2026
License and commercial use: UltraVNC says it is distributed under the GNU General Public License and is free for all usages, including commercial use. · uvnc.com, 11 Oct 2026
NAT connections: The Repeater can proxy connections so a Viewer and Server behind separate firewalls or routers can connect through it. · uvnc.com, 11 Oct 2026
Project history: The project says UltraVNC began in 2002 and names Rudi De Vos and Ludovic Bocquet as its two team members. · uvnc.com, 11 Oct 2026
Remote access: UltraVNC Server and Viewer let a user view and remotely control another computer with their mouse and keyboard. · uvnc.com, 11 Oct 2026
Single Click support: UltraVNC SC is a customizable, preconfigured small server that a customer can run without installing software or using the registry. · uvnc.com, 11 Oct 2026
Supported platforms: Windows · uvnc.com, 20 Sept 2026
Supported Windows versions: The home page lists Windows 7, 8, 8.1, 10, 11 and Windows Server 2008 R2 through Server 2025 for the current version. · uvnc.com, 11 Oct 2026
Technical support: The project directs users with technical questions to its forum or GitHub first. · uvnc.com, 11 Oct 2026
VNC compatibility: UltraVNC says it is compatible with RealVNC, TightVNC, and most other VNC variants that follow the RFB protocol. · uvnc.com, 11 Oct 2026