The SSH client for Windows that lives in one window.

01  /  one window

Every server in one window — not a taskbar of them.

PuTTY gives you one window per connection; ten servers means ten windows to alt-tab through. Termalin gives you browser-style tabs with a hosts sidebar, snippets, and session restore with scrollback — real xterm-256color sessions on a Rust core that stays light on RAM with a wall of hosts open for weeks. Weighing the field? We compared nine Windows SSH clients.

• ▸A live status bar for the box you're on — CPU, memory, disk, network, load, uptime, processes, logged-in users and open ports, with details on hover.
• ▸Watch grid — every open session mirrored side by side as a live tile, so you drive a change across a fleet and see each box respond.
• ▸Type once, run everywhere — broadcast a command to every open session and watch them all answer in the grid.

02  /  switching from putty

Your PuTTY sessions come over in one click.

On Windows, Termalin reads PuTTY's saved sessions in one click — or drop in a .reg export if you prefer. It imports from an ~/.ssh/config or a CSV too, and exports back to an SSH config or CSV at any time, so there's no lock-in, either direction. Install is a single .exe for Windows 10 or later, and the app keeps itself updated with signed auto-updates.

Want the whole field? We compare Windows SSH clients — nine of them, PuTTY and Windows Terminal included — in detail.

03  /  files

SFTP with a real editor — no download-edit-upload loop.

Browse remote files next to the terminal and open them right there — a real editor with syntax highlighting, search & replace and in-place save, no round-trip through a local copy or a second app.

• ▸More than code — open images, PDFs, Markdown, CSV and archives in place.
• ▸Dual-pane file manager — drag between panes, local↔host or host↔host: one drag moves a file between two servers, no manual download-then-re-upload.
• ▸RDP, VNC, FTP, Telnet, Serial/COM and S3 are first-class hosts too — the same tabs, files and history for each.

04  /  keys, hello & agents

One unlock — then Windows Hello gets you back in — for you and your agents.

Everything is encrypted behind one master password — unlock once, and Windows Hello gets you back into a locked session, with auto-lock on idle and lock-on-minimize when you step away. Termalin's own key agent signs on your behalf: unlock once, passphrases cached on your terms, no key ever touching disk in plaintext and no separate agent service to keep running. The same custody extends to AI: the built-in MCP server lets your agent open its own SSH sessions or step into yours, while a key custodian signs for it — you watch every move in the grid, and each agent action is marked in the recording.

05  /  rdp & vnc

RDP and VNC desktops — in a tab, next to SSH.

Add a Windows desktop as a host and open it in a tab, right beside your SSH sessions — no second app. Mouse, keyboard, Ctrl+Alt+Del and the clipboard both ways, with the RDP certificate pinned on the first connect. A direct connection from the app to a public address is free; reaching a desktop behind NAT through a Connector, or from the browser cabinet, is on the paid plans. VNC desktops work the same way. More on the RDP client →

06  /  windows servers

Your Windows servers, over SSH — with no port open.

One PowerShell line turns a Windows machine into a Termalin Connector host: irm https://termal.in/i/<token>.ps1 | iex. It installs the OpenSSH Server if it's missing and gives SSH sessions a PowerShell shell — and when it adds OpenSSH, sshd listens on the machine only and port 22 stays closed. You get a PowerShell terminal in the browser or the app, files, an RDP desktop with a Files panel, and monitoring with alerts. The Connector runs on Windows 10, 11 and Windows Server. Windows Server over SSH →