Ptylon

Ptylon

A self-hosted, browser-native terminal workspace — Termius in a browser tab.

[](https://github.com/alexfrmn/ptylon/actions/workflows/ci.yml) [](https://nodejs.org/) [](LICENSE)


**Ptylon** puts persistent terminals, a real browser, files, and an editor in a single browser tab on a server you own. It is built for running coding agents — **Claude Code, Codex, and anything else that lives in a shell** — where their sessions survive restarts, they can drive a real browser, and you can check on them from any browser.

Quick start	Docker	Architecture	Production	Contributing

The Problem

Running a coding agent on a remote box is clunky. You SSH in, start Claude Code in tmux, and hope the session is still alive when you come back. The agent can run commands but can't *see* a browser to test what it built. Your files are on the server, your editor is somewhere else, and none of it is reachable without SSH-ing back in from the right machine.

Ptylon removes that friction: the agent runs in a persistent server-side session, gets a real browser it can click through, and the whole workspace — terminals, files, editor, browser — is one authenticated URL you can open from any browser.

Why Ptylon

• Keep the shell alive. A dedicated PTY daemon owns node-pty sessions, so a WebSocket gateway restart does not terminate running shells.
• Work in context. Split panes, named workspaces, file management, Monaco edi