Overview

PlayJS is a desktop JavaScript and TypeScript playground for macOS, Windows, and Linux. It gives you a professional-grade code editor paired with a real-time output panel, so you can write code and see results instantly — no browser, no terminal, no build tools required.

What You Can Do

See Results Instantly — The output panel displays results in real-time, aligned line-by-line with your source code. Toggle between auto-run and manual execution.
Use NPM Packages — Search, install, and manage npm packages directly within the app. Import them with standard import or require syntax.
Save Code Snippets — Create reusable code snippets that appear as auto-completion suggestions in the editor.
Set Environment Variables — Define process.env variables that are available across all your tabs.
Chat with AI — Built-in AI assistant that can explain code, answer questions, and interpret output. Supports OpenAI, Anthropic, Google, DeepSeek, xAI, MiniMax, and Kimi.
Customize Everything — 9 themes, configurable editor settings, Prettier-based formatting, Vim key bindings, and experimental TC39 proposal support.

Quick Start

Download PlayJS for your platform
Open the app and start typing JavaScript or TypeScript in the editor
Results appear automatically in the output panel on the right
Explore the sidebar tools — NPM packages, environment variables, snippets, and AI chat

Free vs Licensed

PlayJS works out of the box with core editing and execution features. A license unlocks additional tools including NPM package management, environment variables, snippets, and more. Visit the pricing page for details.