TypeScript Playground
Compile TypeScript to JavaScript and run it instantly with readable output and errors
Compile TypeScript in your browser, inspect emitted JavaScript, and run the compiled output locally. Drafts save automatically.
Console
Run code to see logs, returned values, warnings, and errors.
About, use cases, and privacy
About TypeScript Playground
The TypeScript Playground helps you understand how typed code becomes browser-ready JavaScript. It compiles TypeScript in the browser, shows the generated JavaScript, and runs the result so you can connect type annotations with actual runtime behavior.
This is useful for learning interfaces, type aliases, unions, optional fields, typed arrays, function signatures, and strict-mode habits. Beginners can see that TypeScript improves development feedback but still produces JavaScript. Experienced developers can use it as a quick scratchpad for examples, docs, and code review explanations.
The compiler loads client-side and your code is saved locally in browser storage. Use it when preparing lessons, testing small type examples, comparing JavaScript output, or practicing TypeScript before moving into a full project with bundlers and package dependencies.
Frequently Asked Questions
It transpiles TypeScript and reports compiler diagnostics available from the browser compiler path.