TypeScript to JavaScript Online Compiler | Fast & Clean Transpilation

⚡ TypeScript to JavaScript

Remove TypeScript types and TS-only syntax to get runnable JavaScript (best-effort, no Babel/tsc required).

📝 Input TypeScript:
Note: This tool does “best-effort” conversion (regex-based). Complex TS features (decorators, enums, namespaces, const assertions, satisfies, etc.) may need a real transpiler.
📤 Output JavaScript:
// JavaScript output will appear here...
💡 Example TypeScript Samples:
🧪 Functions + Types
Functions with return/param types
🏛 Class + Modifiers
Class with modifiers and implements
📦 Type-only Imports
import type / export type

Effortless TypeScript to JavaScript Transpilation

TypeScript offers incredible developer ergonomics, but browsers and Node.js require JavaScript to run. Our TypeScript to JavaScript tool provides a seamless way to convert your .ts and .tsx files into executable .js code. Whether you're debugging a snippet or learning how TypeScript compiles under the hood, our tool delivers instant results.

Core Features of the Compiler

  • Modern JS Support: Choose between ES5, ES6, or the latest ESNext targets.

  • JSX/TSX Compatibility: Easily convert React TypeScript components into valid JavaScript.

  • Code Minification: Option to output compressed code for production testing.

  • Browser-Side Processing: Your source code remains private and secure as the compilation happens in your browser.

How to Use the TS to JS Converter

  1. Paste Source: Input your TypeScript code into the left-hand editor.

  2. Adjust Settings: Select your target ECMAScript version (e.g., ES2020) and toggle decorators or JSX settings.

  3. Instant Compile: View the transpiled JavaScript output in real-time.

  4. Export: Copy the code to your clipboard or download it as a .js file.

Why Use an Online TypeScript Compiler?

While local build tools like tsc, Webpack, or Vite are standard for large projects, an online compiler is essential for rapid prototyping and troubleshooting.

1. Instant Debugging and Prototyping

Testing a specific TypeScript feature or a complex generic? Skip the project setup. Paste your code here to see exactly how the TypeScript compiler handles your logic, especially useful for understanding Type Erasure.

2. Learning TypeScript Internals

If you are new to the language, seeing the side-by-side comparison of TS vs. JS helps you understand how interfaces, enums, and namespaces are transformed into standard JavaScript objects and functions.

3. Quick Script Conversion

Sometimes you just need a quick utility script written in TypeScript to run in a environment that only supports Vanilla JS. This tool eliminates the need for a local tsconfig.json setup.

Frequently Asked Questions

What happens to my Types and Interfaces?

JavaScript does not have a type system. During compilation, all TypeScript-specific syntax (interfaces, types, and annotations) is removed through a process called Type Erasure, leaving only the functional logic.

Does it support Decorators and Metadata?

Yes, you can enable experimental decorators in the settings panel to see how they are transpiled into legacy or modern JavaScript patterns.

Is the output production-ready?

Absolutely. We use the official TypeScript compiler (TSC) engine to ensure the output is identical to what you would get from a professional local development environment.

Pro Tips for Clean JavaScript Output

  • Target Selection: If you are targeting older browsers (like IE11), ensure you select ES5 as your target to include necessary polyfills and transformations.

  • Check for Errors: Our editor highlights syntax errors in real-time, helping you fix broken TypeScript before you even hit compile.

  • Remove Comments: Use the "Strip Comments" option if you want a cleaner, smaller JavaScript file for quick distribution.