UltraVNC is a free, open-source remote desktop tool for Windows built on the VNC protocol. It provides a Viewer for connecting to remote computers and a Server for making a PC controllable, adding extras beyond standard VNC such as file transfer, built-in text chat, Windows-integrated logon authentication, and plugin-based encryption for securing sessions.
Why UltraVNC Adds More Than a Standard VNC Implementation
Standard VNC only handles screen sharing and input, but UltraVNC layers on practical extras that Windows administrators actually need day to day, including a file transfer panel and MS logon authentication that ties server access to existing Windows or Active Directory accounts instead of a separate VNC-only password. That combination has made it a common choice for internal IT support tools built on top of free, open-source remote access.
UltraVNC Features
- VNC Viewer and Server — connect to or host remote access from separate installable components.
- File Transfer — move files between the local and remote computer during a session.
- Text Chat — communicate with the remote user without a separate chat app.
- MS Logon Authentication — authenticate server access using Windows or Active Directory accounts.
- Encryption Plugins — add stronger encryption to sessions via the DSM plugin system.
- Single Click Support — a lightweight helper mode for one-off remote support sessions.
- Mirror Driver — an optional video driver that improves screen-capture performance.
- Open Source — free to inspect, modify, and redistribute under the GPL.
How to Install UltraVNC on Windows
- Open the official download page using the button on this page, which links to uvnc.com.
- Download the UltraVNC installer matching your Windows version (32-bit or 64-bit).
- Run the installer and choose to install the Viewer, Server, or both.
- Set a VNC password for the Server during setup to secure remote access.
- Connect from another PC using the Viewer and the server's IP address or hostname.
Is UltraVNC really free?
Open Source. UltraVNC is free, open-source software released under the GPL, with no paid tier or account required.
How to download UltraVNC safely
Use the request button on this page and we will email you the current link for uvnc.com — the publisher's own website — so you receive the authentic build. We do not host, mirror, patch or repackage this software in any way.
Avoid third-party "download manager" sites offering UltraVNC. They commonly wrap the genuine installer in their own bundler, which is how adware and browser hijackers get onto a machine that the user believed was clean.
Alternatives to UltraVNC
Other free remote desktop software worth comparing before you decide:
TightVNC
A free, open-source VNC remote desktop tool for Windows.
AnyDesk
A fast remote desktop tool with a free plan for personal use.
Frequently asked questions
Is UltraVNC free?
Yes, UltraVNC is completely free and open source under the GPL license.
What extras does UltraVNC add over standard VNC?
It adds file transfer, built-in text chat, MS logon authentication, and an encryption plugin system on top of the base VNC protocol.
Is UltraVNC available for macOS or Linux?
UltraVNC is built specifically for Windows; Mac and Linux users typically choose a different VNC implementation.
Can UltraVNC use Windows accounts to log in to the server?
Yes, its MS Logon feature can authenticate remote access using existing Windows or Active Directory credentials.
Does UltraVNC support encrypted connections?
Encryption is not built in by default but can be added through UltraVNC's DSM plugin system.
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