Termtastic is a terminal replacement suitable for the modern age of agentic software development. Tabs, panes, a built-in tmux-like server, and first-class awareness of the AI agents you run.
Independent tabs, each with a flexible grid of panes. Drag to resize or rearrange, maximize on the fly, and mirror a single session into a linked view across tabs.
A built-in, tmux-like multiplexing server keeps your sessions alive even if the UI crashes or restarts. Full scrollback is replayed back to you on reconnect — no work lost.
Termtastic reads the screen of Claude Code, Codex and Gemini CLIs and tells you their state at a glance — a red glow when an agent is waiting on you, a blue glow while it's working.
Keep an eye on your Claude Code budget without leaving the terminal. Session, weekly and Sonnet-specific usage sit in the bottom bar with reset times and color-coded limits.
Open a file-explorer pane right beside your shell. Tree view, glob filtering, syntax-highlighted previews and rendered markdown — no context-switch to a separate app.
* and ?Review changes in an inline or side-by-side diff viewer — even a P4Merge-style graphical view with connector lines. Spin up new branches and worktrees straight from the pane, auto-stash and all.
A full theme editor with live preview lets you tune every surface — terminal, sidebar, tabs, chrome and panes — independently. Light and dark slots, favorites, and per-pane font sizing.
The native macOS app, a full web client, and Android & iOS apps all connect to the same session-multiplexing server. Start work at your desk, glance at it from your phone.
The full Termtastic web client, running right here in your browser against a simulated session server. Type in the terminals, drag panes around, switch layouts, open the git diff and the file browser — nothing to install, and nothing leaves the page.
Tip: click into a shell pane and run help. Tabs, pane
drag & resize, layout presets and the theme manager all work —
commands are simulated, and the demo resets on reload.
Free while in beta. One server, every device — grab the native macOS app, open the web client, or try the experimental mobile apps.
Native app for Apple Silicon & Intel. macOS 13 Ventura or later, with a global launch hotkey.
Download .dmgOpen the full client in any modern browser — on localhost or, with a user-authorized device, remotely.
Open web clientObserve sessions and type into terminals from your iPhone or iPad. Early access — features are still landing.
Join TestFlightThe same observe-and-type workflow on Android. Early access — expect rough edges as it matures.
Download .apkAll clients connect to the same tmux-like session server, so your work is waiting for you wherever you reconnect. Remote connections are plain HTTP and require explicit per-device authorization.