#1
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 Likely dormant
3 self-hosted JSFiddle alternatives
Browser-based code editor and playground for HTML, CSS and JavaScript that lets users write, run, fork and share interactive front-end code snippets ('fiddles'). Supports external resources, embedded previews and simple collaboration.
Alternatives to JSFiddle
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 Actively maintained
#3
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 Actively maintained
What replacing JSFiddle actually involves
Every option on this page is open source and free to run on your own hardware, so you own the data and there is no subscription to cancel. 2 of 3 shipped a commit in the last six months. Licences in this list: MIT. In exchange you take on hosting, backups and updates yourself.
Browse everything in IDEs & Web Dev Environments.
