7 self-hosted CodeSandbox alternatives

code-server runs Visual Studio Code in your browser, providing a remote development environment you can self-host on a VM or container and access from any device.

79.1k stars6.8k forksMITlast commit 26 Aug 2026Actively maintained

JupyterLab is an extensible web-based IDE for Jupyter notebooks, code, terminals, and data exploration with rich outputs and a plugin-based interface.

15.3k stars4.1k forksBSD-3-Clauselast commit 26 Aug 2026Actively maintained

Efficient, minimal collaborative code editor with real-time editing in the browser, OT-based syncing, WebSocket communication, and optional SQLite persistence.

4.1k stars215 forksMITlast commit 2 Feb 2025Likely dormant

Open-source, browser-based code playground that runs entirely client-side; supports 90+ languages and embeddable demos, with Docker-based self-hosting.

1.5k stars265 forksMITlast commit 15 Aug 2026Actively maintained

Atheos is a self-hosted, web-based cloud IDE and code editor with a small footprint, featuring plugins, multi-user support, and built-in Git integration.

677 stars93 forkslast commit 20 Jul 2026Actively maintained

Web-based IDE for Java 8 focused on teaching: teacher-managed assignments, JUnit auto-testing, isolated execution via Docker workers, and Gitea-backed projects.

37 stars4 forksMITlast commit 18 Mar 2025Slowing down

XRSH is a browser-based XR terminal/REPL that can run standalone from a single executable, optionally booting a Linux ISO and embedding into A-Frame scenes.

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