JSFiddle
JSFiddle is an online coding environment and snippet playground that allows developers to write, test, and debug HTML, CSS, and JavaScript code in real-time. It supports various preprocessors such as SCSS, TypeScript, JSX, and CoffeeScript, alongside integrated support for popular frontend frameworks like React and Vue. Users can easily include external libraries via CDNJS, simulate asynchronous requests, and share their work or embed code snippets into other websites.
Checked on Sep 30, 2026.
Alternative resources
Quokka
A live scratchpad for JavaScript and TypeScript that runs code immediately as you type within your code editor.
Python Playground
Fast and convenient Python compiler and editor Chrome extension that lets you run and test Python code directly in your browser popup.
Console Ninja
A debugging tool that displays console logs, runtime errors, and network requests directly in your code editor.