Web-Based Code Playground
Code Playground is a free online editor supporting JavaScript, TypeScript, Python, and HTML/CSS/JS with live execution in your browser — no server required. Write, test, and download code instantly. Perfect for learning, prototyping, interviews, and debugging.
Supported Languages
Runnable: JavaScript, TypeScript, Python (via Pyodide WebAssembly), HTML/CSS/JS.
Privacy-First Design
All code executes client-side. Your snippets never leave your browser. Uses localStorage for persistence, WebAssembly for Python, and sandboxed iframes for JavaScript/HTML. No accounts, no tracking, no server logs.
Frequently Asked Questions
Q:Which languages support live code execution?
JavaScript, TypeScript, Python (via Pyodide WebAssembly), and HTML/CSS/JS run live in your browser entirely client-side.
Q:Is my code saved or sent to a server?
Your code saves automatically to your browser's localStorage. No code is uploaded to any server. Execution happens entirely client-side using iframes (JS/HTML) or WebAssembly (Python).
Q:Can I use npm packages or import modules?
For JavaScript/TypeScript: only browser globals (fetch, DOM, etc.) — no npm. For Python: Pyodide includes many scientific packages (numpy, pandas, matplotlib) but not all PyPI packages. Check Pyodide docs for available packages.
Q:How do I share my code?
Click the Share button to copy a link with your code encoded. You can also download code as a file and share manually.
Q:What are the keyboard shortcuts?
Ctrl/Cmd+Enter: Run code. Ctrl/Cmd+S: Download file. Tab: Indent (in editor). Escape: Close language picker.