JavaScript Playground
Run JavaScript snippets safely in the browser for learning, practice and quick debugging
Run modern JavaScript snippets locally with async/await support and captured console output. Drafts save automatically.
Console
Run code to see logs, returned values, warnings, and errors.
About, use cases, and privacy
About JavaScript Playground
The JavaScript Playground is built for quick practice and debugging without opening a local editor. It runs snippets in an isolated browser frame and captures console output, which makes it useful for learning array methods, object transformations, date logic, functions, loops, and small interview-style exercises.
Because the runtime is the browser itself, the behavior matches frontend JavaScript rather than a server environment. That is helpful when testing DOM-safe language features, modern syntax, JSON handling, timers, and data transformations you plan to use in client-side code.
Your draft is saved locally so you can return to the same exercise later. Use Ctrl+Enter or Cmd+Enter to run code quickly, copy examples into lessons or docs, and reset the editor when you want a clean scratchpad. No backend, account, or package install is required.
Frequently Asked Questions
No. It runs browser JavaScript, so Node-only APIs such as fs or process are not available.