ultravnc/UltraVNC

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

1426 stars · 285 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

UltraVNC is a free, open-source VNC (Virtual Network Computing) suite for Windows comprising a VNC Server, Viewer, Repeater proxy, and Single Click (SC) lightweight server. It implements the RFB protocol to view and control a remote computer's screen, keyboard, and mouse over a network or the internet.

Use cases

• remotely control a Windows PC from another computer
• provide remote IT support to customers without installing software
• connect to machines behind NAT or firewalls via a repeater
• view and manage multiple remote desktops in tabs
• transfer files to and from a remote computer
• set up a free self-hosted alternative to TeamViewer

When to choose

• you need free, open-source remote desktop access for Windows machines
• you support customers who need one-click, no-install remote connections
• you must traverse NAT/firewalls using a repeater or reverse connections
• you want VNC features like file transfer, chat, and MS-Logon authentication

When to avoid

• you need cross-platform server support (UltraVNC is Windows-only)
• you need a polished commercial-grade remote support product with session recording
• your environment requires modern encrypted-by-default protocols like RDP or proprietary solutions out of the box

Facets

application · maturity active

networking security gui cross-platform windows self-hosted developer-tools privacy windows cpp vnc rfb-protocol remote-access remote-support vnc-server vnc-viewer repeater single-click helpdesk nat-traversal remote-desktop file-transfer desktop

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markdown · JSON · MCP: product_card(name="ultravnc/UltraVNC")