JS Bin - Collaborative JavaScript Debugging
A live pastebin for HTML, CSS & JavaScript and a range of processors, including SCSS, CoffeeScript, Jade and more...
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JS Bin is an open-source collaborative online editor for testing, debugging, and sharing HTML, CSS, and JavaScript code snippets in real-time.
π Overview
JS Bin is a webapp specifically designed to help JavaScript, CSS, and frontend developers test snippets of code collaboratively. It features a live preview pane, real-time editing, and shareable URLs that allow others to edit and debug code together without local setups.
The project solves the challenge of collaborative frontend code debugging, especially for issues like Ajax calls or CSS quirks, by providing an instant, embeddable environment. It's built for developers, educators, teams, and anyone needing quick code prototyping and sharing.
Created by Remy Sharp in 2008 after inspiration from John Resig's tool, to facilitate remote debugging sessions. It evolved from PHP to Node.js and remains a staple despite competitors like CodePen and JSFiddle.
β¨ Key Features
- Real-time saving, editing, and live preview of HTML, CSS, JavaScript with console output
- Collaborative CodeCast for live typing sessions and remote rendering across devices
- Shareable, editable URLs; embed options; snapshots and versioning
- Built-in processors for CoffeeScript, LESS/SCSS, Markdown, Jade, and more
- Export to GitHub Gist, download ZIP, save as templates; private bins (pro)
Optional: Upcoming v5 rewrite in active development
π Tech Stack
- Frontend: JavaScript, CodeMirror (editor), Modernizr, Polymer, HTML/CSS
- Backend: Node.js, Nginx
- Hosting: AWS (S3, Route53), Cloudflare CDN
- Payments: Stripe; Analytics: Google Analytics
- Self-hostable via npm
π₯ Who Is This For?
This project is useful for:
- Developers who want to quickly prototype and debug frontend code snippets
- Teams looking for free collaborative code sharing and live editing
- Indie makers, educators, and bloggers building interactive code examples
πΈ Screenshots / Demo
- Live demo: https://jsbin.com
- GitHub: https://github.com/jsbin/jsbin
π₯ Project Status
- π‘ Maintained
Last updated: 2026-03-24
β FAQ
Is this project free?
Freemium β Fully functional core is free and open source; pro upgrades for private bins, vanity URLs via Stripe. Donations encouraged via OpenCollective.
Is the source code available?
Yes β https://github.com/jsbin/jsbin
Can I contribute?
File issues/PRs on GitHub (https://github.com/jsbin/jsbin/issues), contribute financially via OpenCollective (https://opencollective.com/jsbin/contribute), or help with v5 development.
π¬ Contact & Links
- Website: https://jsbin.com
- GitHub: https://github.com/jsbin/jsbin
- Twitter/X: https://x.com/js_bin , https://x.com/rem
- Email: Feedback via GitHub issues or OpenCollective
Built with β€οΈ and kept warm on WarmIndex.
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