Tarn for Windows · version 1.0.0

The lake,
in your tray.

One switch in the system tray. The rings are grey while you are exposed and glacier while you are not — the same mark, reporting the same truth, now on the desktop.

Windows 10 or 11 · 64-bit · one licence key, same as your phone

Tarn

Not protected Connecting Protected · Vienna

Fig. 1 — The mark is the switch. It lives in the tray, so the state is visible without opening a window.

What it does

Built for how Windows is actually used

  • Lives in the tray — connect, switch location and read the state without opening a window.
  • Kill switch — if the tunnel drops, traffic stops rather than leaking onto the bare network.
  • No account on the machine — one licence key, the same one as your phone, 5 devices on every plan.
  • Works where VPNs get blocked — the same disguise the Android app uses, across all 19 locations.

Verify, then trust

Check what you downloaded

Every build is published with its fingerprint. If the file you verify does not match the line below, do not run it — that is the entire point of printing it here.

Installer tarn-1.0.0-setup.exe
SHA-256 printed here with each published build
Verify certutil -hashfile tarn-1.0.0-setup.exe SHA256

The command runs in any Windows terminal and prints the file’s fingerprint. Installing asks for administrator once, to add the network driver — nothing else runs elevated.

Same lake. Bigger screen.

Your licence key already covers it. Download, enter the key, and the rings in the tray tell you the rest.