Download Termal OS. No agents.

Termal OS is a desktop app for your machine. Install nothing on your servers - it connects over plain SSH. Free forever for one server and one user. On first launch you create a local account; your email is only used to issue and validate your license (no cloud account, no telemetry of your fleet), and your server credentials never leave your machine. During the Preview you can manage up to 3 servers at no cost.

Download for your platform

Linux

Snap (all distros) · or .deb for Ubuntu / Debian · x64

Or download .deb · 126 MB

Snap: one click, auto-updates via the Store. .deb: update via terminal - see below.

SHA-256 · .deb

8ec12705e18a2e1bb384840e4b838f7f7491308fb0479fc311744359c5e194f2

Windows

Windows 10 / 11 · x64 · .exe

Download free · 138 MB

NSIS installer · in-app update alerts

🔒 Unsigned for now - signed thanks to your support.

SHA-256 · .exe

cbc6c493955b795f913968d015b9b2d5621ef700667b315a9020fdb29c55ab1d

macOS

macOS 11+ · Intel · Apple Silicon (Rosetta 2) · .dmg

Download free · 160 MB

See first launch below

🔒 Unsigned for now - signed thanks to your support.

SHA-256 · .dmg

9c7552a7f166c4c74344190f2fd8062c22755687419efcd07e362be5cb8bda03

Free covers one server and one user, forever. Need more? See the plans.

Integrity

Verify what you downloaded.

The Windows and macOS builds are not code-signed yet, so your system cannot vouch for them. The SHA-256 fingerprint under each download button can: compute the hash of the file you downloaded and check that it matches. This matters most if you got the installer somewhere other than this site.

How to compute it

macOS    shasum -a 256 Termal-OS-0.14.0-x64.dmg
Windows  certutil -hashfile Termal-OS-Setup-0.14.0.exe SHA256
Linux    sha256sum Termal-OS-0.14.0.deb

Plain-text list: termalos.com/checksums · JSON

First launch

Opening an unsigned build.

Termal OS is distributed directly from this site, not through the Apple or Microsoft stores. Your OS may warn you the first time - that's expected, and it only happens once.

macOS - right-click the app in Applications, choose Open, then confirm. Using Open from the context menu is what lets you bypass the first-launch block; double-clicking will not offer the option.

Windows - SmartScreen may show “Windows protected your PC”. Click More info, then Run anyway.

Linux - install and update from a terminal. The App Center / double-click does not reliably upgrade an existing install, so run:

sudo apt install ./Termal-OS-0.14.0.deb

If apt reports dependency errors, use sudo dpkg -i Termal-OS-0.14.0.deb && sudo apt -f install. Then launch “Termal OS” from your apps menu.

Good to know

Requirements

A desktop OS (Windows, macOS or Linux) and SSH access to your Linux servers - password or private key. Nothing to install server-side.

Update alerts

Termal tells you in-app when a new version ships, and you install it when it suits you. Silent background updates stay off until the builds are code-signed - pushing unsigned binaries to an app that holds your SSH credentials isn't a risk we'll take.

Your data stays home

Local-first by design: credentials are encrypted locally (AES-256-GCM) and never leave your machine. No cloud account required. How it works →