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TypeScript 5.5

Online TypeScript Compiler

Type-safe JavaScript playground with instant transpilation and type validation. Write code with auto-formatting, test with standard input (stdin), and inspect terminal output in real-time.

✓ Strict static type checking✓ Interfaces, types, enums and generics✓ Instant transpile to standard JS✓ Console logging with type safety
main.ts
TypeScript 5.5
13px
Standard Input (stdin)
Passed to scanf, input(), cin, etc.
UTF-8TypeScript2 SpacesWrap: Off
Ctrl+Enter to Run
Ln 1, Col 127 lines729 chars
Output & ConsoleIdle

Ready to Compile & Run

Click the blue ▶ Run button in the header bar or press Ctrl + Enter to compile and execute your Online TypeScript Compiler.

How to Run TypeScript Code Online

Write type-annotated code, test generics and interfaces, and run transpiled code with zero setup.

  1. Write TypeScript code using types, interfaces, or classes.
  2. Press "▶ Run" or Ctrl + Enter.
  3. View compiled output and execution logs.

Common Errors & Troubleshooting

Encountering compilation or runtime diagnostics? Check these common scenarios:

Type X is not assignable to type YEnsure value structures match declared interface properties.

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Frequently Asked Questions (TypeScript)

Yes, modern TypeScript 5 syntax including const type parameters and decorators is supported.