Eclipse Theia is an extensible framework for building full-featured cloud and desktop IDEs and developer tools with modern web technologies.
It provides a modular platform for creating tailored development environments, supports multi-language workflows, and is developed under vendor-neutral open source governance.
Theia is a completely independent project, based on a new technology stack with a modern web-based architecture. Theia is not a fork of VS Code, but a separate, independently developed platform that shares a few technologies, such as Monaco, LSP, or DAP.
This is free and open source software.
Key Features
- Supports building browser-based and desktop IDEs and tools.
- Provides a highly flexible and modular architecture for adopters.
- Supports the VS Code extension protocol and works with many extensions from the VS Code ecosystem.
- Offers language-aware code editing through the Language Server Protocol.
- Includes a modern workbench with theming, detachable views, dynamic toolbars, and tab management.
- Lets developers create custom extensions and tailored tooling on top of the platform.
Website: github.com/eclipse-theia/theia
Support:
Developer: Eclipse Theia contributors
License: Eclipse Public License 2.0

Eclipse Theia is written in TypeScript. Learn TypeScript with our recommended free books and free tutorials.
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