Online Code Editors / Compliers

Hand-picked list of
'Online Code Editors / Compliers'

Online code editor is a tool that you can edit HTML, CSS and JavaScript code and view the result in your browser.

CodeSandbox
An online code editor with a focus on creating and sharing web application projects.
Home: https://codesandbox.io
Docs: https://codesandbox.io/docs
GitHub: https://github.com/codesandbox/codesandbox-client
CodePen
An online code editor, learning environment, and community for front-end web development using HTML, CSS and JavaScript code snippets, projects, and web applications.
Home: https://codepen.io
Docs: https://blog.codepen.io/documentation
Repl.it
Powerful and simple online compiler, IDE, interpreter, and REPL for 50+ programming languages.
Home: https://repl.it
Docs: https://repl.it/site/docs
JSFiddle
An online community for testing and showcasing user-created and collaborational HTML, CSS and JavaScript code snippets, known as 'fiddles'.
Home: https://jsfiddle.net
Docs: https://docs.jsfiddle.net
Coding Ground (by Tutorialspoint)
Free Online IDE and Terminal.
Home: https://www.tutorialspoint.com/codingground.htm
SQL Fiddle
An application for testing and sharing SQL queries.
Home: http://sqlfiddle.com