The PuTTY alternative with tabs, files and keys built in.

01  /  one window, not twelve

Every server in one place — tabs, files and stats.

PuTTY opens one window per connection. Termalin puts everything in one: browser-style tabs with a hosts sidebar, an SFTP panel next to the terminal, and a status bar with live CPU, memory, disk and network for the box you're on. Close the app and your tabs come back, scrollback included.

• ▸Tabs that stay alive when you switch, with activity indicators when a background session prints output.
• ▸Edit remote files in place — a real editor with syntax highlighting, search & replace and in-place save, no round-trip to a local copy.
• ▸Port forwarding in plain words — no -L/-R/-D flags to memorize; it saves per host and reconnects.

02  /  keys & sync

Unlock once — and take your setup to every machine.

Generate and import SSH keys, view fingerprints, and let Termalin's own agent sign for you — unlock once, passphrases cached on your terms, no key ever written to disk in plaintext. And where PuTTY keeps its sessions on one Windows machine, Termalin syncs hosts, keys and command history across devices, end-to-end encrypted so only you can read them. Read the security model →

• ▸One master password encrypts everything, with auto-lock on idle and Windows Hello re-unlock.
• ▸The server stores only encrypted blobs — hostnames, keys and passwords never leave your device in the clear.
• ▸Works fully offline — the Free tier is local-only; the cloud is an add-on, not a requirement.

03  /  the part no one else has

Built for your agents, too.

Termalin ships a real MCP server over the hosts you choose. Your AI agent lists them and works through Termalin — opening its own sessions or stepping into yours — while a key custodian signs on its behalf, so the agent never holds a key. You watch every move in the grid, live.

04  /  switching

Your PuTTY sessions come with you.

Migration is the easy part — Termalin reads PuTTY's saved sessions directly. And a genuine word of respect: PuTTY is free, open-source and battle-tested, and there's no lock-in here — Termalin exports your hosts to an SSH config or CSV any time, so you can always go back.

• ▸One click on Windows — Termalin reads your saved PuTTY sessions straight from the hosts list's import menu.
• ▸Moving machines? Drop in a .reg export of your sessions and they come across too.
• ▸Keys are the one manual step — PuTTY's .ppk format needs converting to OpenSSH in PuTTYgen (Conversions → Export OpenSSH key) before you import.
• ▸Organise on arrival — folders, tags and colors keep a wall of imported hosts tidy.