Cost / License
- Free
- Open Source
Platforms
- Linux
- Flathub

Thimble by Mozilla is described as 'Webmaker - teach your self to code for the web' and is a Code Editor in the development category. There are more than 10 alternatives to Thimble by Mozilla, not only websites but also apps for a variety of platforms, including Android, Linux, Self-Hosted and iPad apps. The best Thimble by Mozilla alternative is Replit, which is free. Other great sites and apps similar to Thimble by Mozilla are CodePen, jsFiddle, JSPad and JS Bin.

Slingcode is a personal computing platform in a single html file. You can make, run, and share web apps with it. You don't need any complicated tools to use it, just a web browser. You don't need a server, hosting, or an SSL certificate to run the web apps.


Publish HTML quickly with open source web editor, HTMLhouse. Use the editor / real-time preview to build your HTML page, and press publish when you're done. That's it! No sign up, no fuss.

A web-based IDE to teach programming in the classroom. Easily create and share exercises with students. Analyze and inspect students' submissions.


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




CodeBunk provides a Realtime Collaborative Editor with Compile/Run. CodeBunk is an Online Compiler/Interpreter for PHP, Python, Ruby, Perl, Lua, Javascript, C, C++. CodeBunk also has Peer-to-Peer Video/Audio chat facility.

CodeBunk is the most popular commercial alternative to Thimble by Mozilla.
Aaditor is World's first HTML editor with drag layout. Aaditor has a function of full screen result. You can change the layout of Aaditor according to your wish. All the html,css and js boxes of Aaditor can be dragged , resized and minimized .
A collaborative online web development platform using HTML, CSS and JavaScript with a focus on design systems and financial applications.

codeExec let you create your own web application allowing users to create and execute code written in JavaScript, HTML, and CSS online.




BoxCoding is a website for frontend developers featuring hundreds of community-made CSS and HTML UI elements. All elements are open source and free to use. Explore Elements and Free Source Code in HTML, CSS and JavaScript that can be used in your next project.



Online development environment, accompanying you from coding to release, with realtime preview, Github import/commit, FTP upload, embed, console, code validation, public and private projects.


