JS Bin is a collaborative open source JavaScript debugging tool. Enter Javascript in one pane and HTML in the other and see the result; share using a short URL. Choose popular JS libs from a menu, so you don't have to remember the URL.

The best open source alternative to Dabblet is JS Bin. If that doesn't suit you, our users have ranked more than 25 alternatives to Dabblet and 12 is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Dabblet are shelf.gg, kodeWeave, Try It Online (TIO) and fastpen.
JS Bin is a collaborative open source JavaScript debugging tool. Enter Javascript in one pane and HTML in the other and see the result; share using a short URL. Choose popular JS libs from a menu, so you don't have to remember the URL.

kodeWeave is a realtime coding playground for HTML, CSS and Javascript. Similar to JSFiddle and JSBin, but kodeWeave was made to work offline but also as a prototyping application to build applications for desktop operating systems while on mobile devices.




TIO is a family of online interpreters for an evergrowing list of practical and recreational programming languages.
Fastpen is an open source alternative to codepen that just stores the source code compressed, in the url.


Plunker is an online community for creating, collaborating on and sharing your web development ideas.





HTCSJS is an online HTML, CSS and JavaScript coding tool. It functions on mobile (unlike JSFiddle), and allows any* external resources. It also allows pasting on iOS, unlike many others. http://shhnowisnottheti.me/demo/
*varies b/c it uses data URLs




Web Maker is an easy, quick and offline web experiment playground available as a Chrome extension, with open source code available at GitHub.



