How to Use TypeScript Playground
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1. Write TypeScript
Type code with types, interfaces, generics, or enums in the editor.
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2. Compile and Run
Click Run or press ⌘↵. TypeScript compiles in your browser, then the JavaScript executes.
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3. Check the Console
Type errors and runtime output both appear in the Console panel.
The Technical Details
This interactive web utility provides fast, reliable, and completely private data transformations. In modern workflows, quick formatting, conversions, or estimations are essential. By running all logic entirely in your browser with client-side JavaScript, this tool guarantees that your data never leaves your machine. This approach delivers maximum performance and absolute data privacy, as no information is ever sent to a server.
Frequently Asked Questions
Which TypeScript version is used?
The latest TypeScript compiler available via CDN is loaded, which is currently TypeScript 5.x.
Are type errors shown?
Yes. Type-check errors surface in the Console as compilation errors before any code runs.
Can I import npm packages?
No. Only built-in TypeScript types and browser globals are available. No module imports.
Is compilation done on the server?
No. The TypeScript compiler runs in your browser via the official TypeScript CDN bundle.