CosmicSSH — Professional SSH & SFTP Client for Windows. Connect, Transfer, Manage.
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CosmicSSH for Windows

Version 06.07.2026.11.41.48 · built June 7, 2026

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Unsigned build — on SmartScreen click More info → Run anyway.All releases →
Features

Everything you need in an SSH client.

SSH Terminal

  • Multi-tab SSH terminals powered by xterm.js with full 256-color support
  • Open many sessions at once, each in its own tab
  • Tile tabs vertically, horizontally, or as free-floating MDI windows
  • ProxyJump / multi-hop chains through bastion hosts, zero manual setup
  • Keyboard shortcuts for every action

SFTP File Manager

  • Dual-pane browser — local on the left, remote on the right
  • Drag & drop files and folders between panes
  • Folder upload / download with live progress and ETA
  • Create, delete, rename, chmod — edit remote files in your local editor
  • SFTP-only profiles to browse files without opening a shell

Session Profiles

  • Save and organize profiles by folder / group
  • Password, SSH key file, and SSH agent authentication
  • ProxyJump chains configured per profile, multiple levels deep
  • CSV import / export to back up or share your session list
  • F2 to rename, right-click menu, drag-and-drop to regroup

Security

  • Encrypted credential storage via Windows DPAPI — never plain text on disk
  • Private-key auth (OpenSSH keys, with passphrase support)
  • Host-key verification with SHA256 fingerprints and known_hosts
  • Sandboxed renderer with Context Isolation — the UI has zero Node.js access

Theming & Customization

  • Three built-in themes: Dark, Light, and Blue
  • Custom text color plus separate controls for chrome and terminal
  • Ctrl + mouse-wheel to zoom the terminal font on the fly
  • Wide font choice — Cascadia Mono, Consolas, IBM Plex Mono and more
  • Drag to resize the sidebar

Window Management

  • Multiple windows open at once
  • Tile windows vertically, horizontally, or cascade them
  • Tile tabs within a window in any layout
  • Collapsible sidebar (Ctrl+B)

Session Logging

  • Stream-to-disk logging from the moment you connect
  • One-click scrollback dump to a timestamped text file
  • ANSI escape sequences stripped — clean, human-readable logs

Portable & Installer

  • Portable .exe — drop it on a USB stick and carry your profiles with it
  • Installer for per-user setup with Start Menu & desktop shortcuts
  • In portable mode all data lives next to the executable — fully self-contained
  • Built for Windows 10 & 11