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The original was posted on /r/opensource by /u/deadmannnnnnn on 2025-05-20 05:59:57+00:00.

Hey everyone!

I’ve been building CodeCafé — a collaborative, browser-based code editor with zero setup. No downloads, no sign-up — just share a link and start coding together.

It’s built with React + TypeScript (frontend) and Java Spring Boot (backend), using WebSockets and a custom Operational Transformation system (no libraries!) for real-time sync. Redis handles state.

New Stuff I have added:

• Docker support for easy self-hosting
• CI/CD with GitHub Actions
• Switched to MIT license for easier contributions

It all started when I saw coding being taught via Google Docs. I wanted something free and instant — but made for real code.

GitHub: https://github.com/mrktsm/codecafe

Live: https://codecafe.app/