@omniterm/host

omniterm

omniterm puts persistent terminal sessions, project files, and a live browser view in one web app.

Run it on the computer that holds your projects — a laptop, a home server, or a cloud VM with no desktop — then open it from a laptop, tablet, or phone. Your terminal sessions keep running when you close the browser or lose your connection.

Why use omniterm?

• Use your preferred coding agent. Run Codex, Claude Code, Antigravity (agy), or any other command-line tool.
• Keep work running. Terminal sessions survive closed tabs, lost connections, device changes, and omniterm restarts.
• Work from any device. You only need a browser and secure network access to the computer running omniterm.
• Run it on a headless server. No desktop, display server, or VNC needed.
• Drive a real browser on that server. When something in your terminal opens a URL, you can click, type, and scroll that browser from your device.
• Use your existing tools. Every terminal is a real tmux session that you can also open over SSH.
• Add features with plugins. Plugins load at runtime without changing or rebuilding the main app.

Install and run

omniterm requires Node.js 24 or newer, tmux, and ttyd. It runs on a server with no desktop. Add Chrome or Chromium if you want the interactive remote browser.

Install tmux and ttyd:

# macOS
brew install tmux ttyd

# Ubuntu or Debian
sudo apt install tmux
sudo snap install ttyd --classic

Install omniterm and start it:

npm install -g @omniterm/host
omniterm

Then open http://localhost:17717.

The npm package is named @omniterm/host, but the command is omniterm. You can also run it without installing it globally — name the package with -p and the command after it, since the package ships more than one binary:

npx -p @omniterm/host omniterm

Change the ports

Use a different web server port:

omniterm --port 8080

omniterm uses ports 7700 through 7799 for terminal sessions. If another program uses those ports, choose a different range:

omniterm --ttyd-ports 8800-8899

Run omniterm --help to see every command-line option.

What you get

Terminals

• Open several terminal tabs and split each tab into multiple panes.
• Arrange panes side by side or top to bottom.
• Reorder and rename tabs.
• Scroll through terminal output and select text normally.
• Find and use tmux sessions that were started outside omniterm.

Workspaces

• Switch between Git repositories, worktrees, and regular directories.
• Clone a repository or browse the server's files to add a workspace.
• Create and manage Git worktrees from the browser.
• Run multiple coding agents in separate workspaces and watch them side by side.

Files

• Browse and edit project files with syntax highlighting and save protection.
• View images, PDFs, and CSV or TSV files without leaving omniterm.
• See file changes when another program or coding agent edits a file.
• Load editor support only when you open a file that needs it.

Interactive remote browser

When something in your terminal opens a URL — a sign-in flow, a coding agent — Chrome starts on the server and appears in omniterm as a live view.

• Click, type, and scroll the remote page from any device.
• Finish sign-in flows on a server without a desktop.
• Switch between running browsers and their open pages from the tab strip.
• Dock the panel beside your terminal or float it on top.
• Put Chrome DevTools beside the page, below it, or hide it.
• Chrome uses its own profile, so your personal cookies and passwords stay out of it.

Phones, tablets, and desktops

• Use a layout designed for both desktop and mobile screens.
• Use touch-friendly terminal controls for keys that mobile keyboards leave out.
• Add omniterm to your home screen as a Progressive Web App (PWA).

Remote access and security

[!WARNING] By default, omniterm listens on all network interfaces. It does not provide its own login or access control, and its APIs can start commands in your shell. Do not expose its port directly to the public internet. Use a trusted private network, VPN, or SSH tunnel.

For an SSH tunnel, bind omniterm to the remote computer's loopback address:

omniterm --host 127.0.0.1

Then run this on your local computer:

ssh -L 17717:localhost:17717 your-server

Open http://localhost:17717 while the tunnel is running.

You can also open http://your-server.tailnet:17717 through a private network such as Tailscale.

Make sure your firewall or network rules allow access only from devices you trust.

Pass environment variables to terminals

Every terminal omniterm opens starts from a clean environment: omniterm keeps a short list of variables (TERM, HOME, PATH, and friends), drops everything else, and then runs your login shell so your own profile builds the rest. That stops the environment of whatever shell you launched omniterm from leaking into every terminal.

If omniterm runs inside an environment you configured on purpose — a container, a remote box, a CI shell — name the variables you want terminals to keep:

MY_TOOL_TOKEN=… omniterm --env-passthrough MY_TOOL_TOKEN,MY_TOOL_URL

You pass names, never values. omniterm reads the values from its own environment, so they never appear in a config file, a log line, or an API response. OMNITERM_ENV_PASSTHROUGH=MY_TOOL_TOKEN,MY_TOOL_URL does the same thing, and takes precedence when both are given. GET /api/session-env reports the names in effect, so you can check the setting without printing a secret.

One limit worth knowing: omniterm can only pass on the value that existed when its terminal backend started, and that backend keeps running even if omniterm itself restarts. If your value changes while omniterm is running — a token that rotates, for example — set it from your login profile instead, which every terminal re-reads as it opens.

A program driving the HTTP API can also set variables on a single terminal:

POST /api/create-session
{ "cwd": "/work", "name": "task-42", "env": { "TASK_ID": "42" } }

Those apply to that terminal, to the command it starts with, to the shell it returns to when that command exits, and to any pane you split from it — and to nothing else. These values are passed to the terminal backend as command arguments, so other users on the same machine can see them with ps. Use them for configuration, not for secrets.

Add plugins

Plugins add features without changing the main app. Load a published npm package by name, or load a local plugin by the path to its built entry file:

omniterm --plugin @scope/my-plugin
omniterm --plugin ./plugins/demo-agent/dist/index.js

To load more than one plugin, repeat the --plugin option. omniterm loads them in the order you provide them.

A local path must point to the plugin's built JavaScript entry file, not just its directory.

To write a plugin, install @omniterm/plugin-types as a development dependency. Your plugin does not need to depend on omniterm's internal code. See the demo-agent plugin for a complete example.

Telemetry

The official npm package collects pseudonymous usage and performance data to help improve omniterm. A random installation ID connects events from one installation. The ID does not come from an account, username, hostname, or machine identifier.

Events may include:

• the installation ID, event time, omniterm version, and event name;
• the server platform and Node.js version;
• session counts and timings, file language, and cleanup counts; and
• app and terminal timings, mobile or desktop mode, and the types of workspaces, panels, tabs, viewers, and editor languages used.

Events do not include names, file or terminal contents, file paths, repository names, hostnames, session names, or third-party plugin identifiers. omniterm disables PostHog's GeoIP enrichment. PostHog still receives the network data needed to deliver an event; see PostHog's privacy policy for its handling and retention rules.

Telemetry is on by default in the official npm package and off in automated environments. You can turn it off in any of these ways:

omniterm telemetry off          # Save the setting
omniterm telemetry status       # Show the current setting
omniterm --no-telemetry         # Turn it off for one run

export OMNITERM_TELEMETRY=0     # omniterm-specific environment setting
export DO_NOT_TRACK=1           # Standard environment setting

You can also turn it off in Settings → Privacy → Telemetry. Environment settings override the saved choice. Local performance measurements remain available at GET /api/metrics/perf, even when telemetry is off, but nothing is sent from your computer.

The PostHog key is added when the official npm package is built. It is not stored in this repository, so a build from source does not send telemetry. To use your own PostHog project in a source build, set OMNITERM_POSTHOG_KEY when you run omniterm.

How it works

omniterm runs a Node.js web server on the computer where your projects live. The server connects the browser interface to standard command-line tools:

• tmux keeps terminal sessions alive.
• ttyd displays those sessions in the browser.
• Express provides the file, workspace, settings, and plugin APIs.
• A JSON file in your home directory stores workspace, tab, file, and layout settings. No database is required.
• Runtime plugins can add tabs, interfaces, HTTP routes, and WebSocket connections. The built-in terminal uses the same plugin system.

Because tmux owns the sessions, they are not locked inside omniterm. You can use tmux attach over SSH, and terminal work continues if the omniterm process stops.

Contributing

See the CONTRIBUTING.md guide for development setup, repository structure, tests, and project conventions.

License

MIT