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xtermium is a terminal with a session manager, for Windows, Linux and macOS. SSH, SFTP, RDP, VNC, telnet, serial, WinRM, websites, BMC consoles and tunnels open as tabs in one window, and everything it stores is encrypted on disk. Every feature is free except two that need Pro, a hosted service: sync and Terminal Co-op.

Guide	What it covers
Installation	Installing on Windows, Linux or macOS, the first start, updates, nightly builds, building from source
Usage	The title bar, getting started, sessions, connections, tabs and panes, the terminal, remote desktops, websites, files, tunnels, security and backups, sync, Terminal Co-op
Security	What's stored where, the encryption, the recovery passphrase, the lock, server keys, passwords, SSH keys, restore points and backups
AI agents	AI agent sessions, the MCP server for assistants, and the xtermium command line
Customization	Theme, colours, fonts, backgrounds, shortcuts, language and custom.css
Development	Building and running from source, how the code is laid out, the checks, accepted audit advisories

Keys, paths and menu names are written as the app shows them. In the app, point at any button to see what it does and its shortcut.

Sync, sign-in or Terminal Co-op not working? First look at status.xtermium.com: it checks sign-in, sync, Terminal Co-op, releases, payments and the website every five minutes, and shows any outage.

Something wrong? Settings › Troubleshoot makes a bundle, a .zip of plain-text files about your installation (version, system, settings without secrets, counts of what's stored and open), to send to support@xtermium.com. Your user and computer names, your home folder and any email or IP address are taken out before it's written. Or open an issue on GitHub.