RunJS
runjs.app
RunJS - JavaScript and TypeScript Playground for macOS, Windows and Linux
A JavaScript playground for your desktop. Perfect for testing the latest JavaScript features and libraries. This is my go-to app for playing around with JavaScript.
Pricing
Buy a RunJS license and get unlimited access to all features, including NPM integration, multiple tabs, snippets, extra themes and more.
Online JavaScript Playground
An easy-to-use online JavaScript playground with live feedback. Write and run JavaScript instantly. Great for learning and prototyping.
Docs
RunJS is a rapid prototyping tool for JavaScript and TypeScript. It can be used as a playground or scratchpad to write and run code. The result of your code is then displayed next to the code you've written.
License Manager
From here, you can manage your RunJS license, control which devices your license is active on and renew your license to keep receiving updates.
Playcode
playcode.io
JavaScript Playground - Free Online JS Sandbox
or download desktop client forMac, Windows, Linux · 11M+ Developers · 23M+ Projects Created · 2016 · Since · TRUSTED BY * * registered email accounts from associated companies · PlayCode is the #1 JavaScript Playground trusted by millions of developers worldwide.
JS Playground
jsplayground.dev
JS Playground — A no-fuss JavaScript playground with instant feedback
It is a web application that provides a minimal and fast JavaScript playground for free. You can think of it as a tiny editor for you to quickly test any JavaScript supported by your browser. It works pretty much as a REPL, where you are given instant feedback on the Console screen as you change ...
Is PlayCode's JavaScript compiler free?
Yes, PlayCode's JavaScript compiler is completely free to use. You can compile and run unlimited JavaScript code, use npm packages, and see live preview results without paying anything. Pro features like AI assistance and private projects are available for subscribers.
playcode.io
playcode.io › javascript-compiler
JavaScript Compiler - AI-Powered JS Compiler Online | Free
Does the JavaScript compiler work offline?
PlayCode works offline once loaded. The compiler runs entirely in your browser using WebAssembly, so you can keep coding without an internet connection. Your code is saved locally and syncs when you're back online.
playcode.io
playcode.io › javascript-compiler
JavaScript Compiler - AI-Powered JS Compiler Online | Free
What is a JavaScript compiler?
A JavaScript compiler transforms your JavaScript code into optimized, executable code. Unlike traditional compilers that produce machine code, JS compilers like PlayCode bundle your code, resolve imports, and transpile modern syntax (ES2026, TypeScript, JSX) into browser-compatible JavaScript that runs instantly.
playcode.io
playcode.io › javascript-compiler
JavaScript Compiler - AI-Powered JS Compiler Online | Free
Playcode
playcode.io › javascript-compiler
JavaScript Compiler - AI-Powered JS Compiler Online | Free
14 hours ago - The JS editor highlights syntax errors in real-time, shows TypeScript type errors inline, and even validates your imports. You can create multi-file projects with HTML, CSS, and JavaScript, or build complex React and Vue applications with proper project structure. Every feature works on any device: desktop, tablet, or mobile. No downloads needed.
Chrome Web Store
chromewebstore.google.com › detail › js-playground › dndbfngnogbaloehcdbedmagjelddakk
JS playground - Chrome Web Store
JS playground. Simple Javascript playground for developers. Dark and Light themes. Libraries included: rxjs, lodash, moment. Autocomplete.
Playcode
playcode.io › javascript
JavaScript Playground
1 week ago - Try this online JavaScript Playground with instant live preview and console. Easy & Fast. Experiment yourself.
SourceForge
sourceforge.net › projects › runjs.mirror
RunJS download | SourceForge.net
October 12, 2025 - Download RunJS for free. A JavaScript playground that auto-evaluates as you type. Explore and experiment with JavaScript and TypeScript, visualize your ideas and get instant feedback as you type. Exploring JavaScript has never been easier.
Mozilla
developer.mozilla.org › en-US › play
Playground | MDN
Playground · Theme · OS default · Light · Dark · English (US) Remember language · Learn more · Deutsch · English (US) Español · Français · 日本語 · 한국어 · Português (do Brasil) Русский · 中文 (简体) 正體中文 (繁體) Format · Run · Share · Clear · HTML · CSS · JAVASCRIPT ·
JSFiddle
jsfiddle.net
JSFiddle - Code Playground
JSFiddle - Test your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle.
WebCatalog
webcatalog.io › home › apps › software development › javascript playground › desktop app
JavaScript Playground - Desktop App for Mac, Windows (PC) - WebCatalog
Don't have WebCatalog Desktop installed? Download WebCatalog Desktop. ... JavaScript Playground is an interactive online tool for writing, testing, and optimizing JavaScript code with real-time execution and collaboration features.
RunJS
runjs.app › play
RunJS - JavaScript Playground | Run JavaScript Online
An easy-to-use online JavaScript playground with live feedback. Write and run JavaScript instantly. Great for learning and prototyping.
TypeScript
typescriptlang.org › play
TypeScript: TS Playground - An online editor for exploring TypeScript and JavaScript
Downloading TypeScript... Version...... Run · Export · Tweet link to Playground · Copy as Markdown Issue · Copy as Markdown Link · Copy as Markdown Link with Preview · Open in TypeScript AST Viewer · Open in Bug Workbench · Open in VSCode TS Playground (alpha) Open in CodeSandbox ·
Boot.dev
boot.dev › playground › js
Online JavaScript Compiler - Interpreter and Playground | Boot.dev
Compile and run JavaScript code in the browser in our free code playground. Debug, edit and execute your programs in a syntax-highlighted online IDE.
Notebookjs
notebookjs.app
NotebookJS - Javascript playground for Desktop
Take private notes, chat with AI directly in context, transcribe meetings, generate reports, and run code snippets. Markdown-based files. A powerful Jupyter alternative for JavaScript, ideal for coding, automation, and data visualization.
Programiz
programiz.com › javascript › online-compiler
Online JavaScript Compiler (Editor) - Programiz
Write and run your JavaScript code using our online compiler. Enjoy additional features like code sharing, dark mode, and support for multiple programming languages.
GeeksforGeeks
geeksforgeeks.org › javascript › top-javascript-playgrounds-every-developer-should-try
Top JavaScript Playgrounds every developer should try! - GeeksforGeeks
July 23, 2025 - CodePen is an online code editor and playground that allows developers to write and share JavaScript code snippets and projects with others.
ByteScout
bytescout.com › apps › js-playground.html
JavaScript Playground - Learn JS, Interactive Online App for JavaScript Developers at ByteScout - ByteScout
February 4, 2019 - OPEN JS PLAYGROUND JS Playground is a great interactive tool that you can use to learn JavaScript and enjoy JS development in a playful way. It has never been so easy to improve JS skills for beginner and advanced ...
Liveweave
liveweave.com
HTML, CSS and JavaScript playground - Liveweave
Initializing · Liveweave Web expand_more · home Home · data_object CSS Explorer arrow_outward · Palette Color Explorer arrow_outward · Polyline Graphics Editor arrow_outward · outbox_alt Gen AI by VAIBL arrow_outward · build Tools expand_more · restart_alt Load "Hello Weaver!"
DevTools Daily
devtoolsdaily.com › javascript › online
Free Online Javascript playground / REPL
Online REPL for javascript. Executes in browser.
Snappify
snappify.com › blog › best-code-playgrounds
7 Best Code Playgrounds for Developers (2025)
December 17, 2024 - CodePen is one of the most popular playgrounds for front-end developers and designers. It is a social development environment with an active community of over 1.8 million developers, where you can create and launch websites, showcase your work, and find inspiration. You can also participate in weekly challenges to learn something new and get featured on their homepage. ... Real-time preview of HTML, CSS, and JavaScript code.