TypeScript to JavaScript Converter

Q: What does TypeScript to JavaScript conversion do?

It strips all TypeScript-specific syntax from your code: type annotations, interfaces, type aliases, generic parameters, access modifiers (public/private/protected), and non-null assertions. The resulting JavaScript is functionally identical but runs without a TypeScript compiler.

Q: When would I need to convert TypeScript to JavaScript?

Common reasons include: using code in an environment that doesn't support TypeScript, sharing a snippet with someone using plain JavaScript, or quickly checking what the compiled output looks like without running tsc.

Strip TypeScript types and convert to clean JavaScript with AI — free, instant, no login required.

TypeScript to JavaScript conversion removes all type annotations, interfaces, generics, and access modifiers — producing clean JavaScript that runs without a compiler. Paste any TypeScript file and get the equivalent JavaScript instantly.

Paste your code, then click Convert

JavaScript

How to use this tool?

This online converter harnesses AI to remove TypeScript-specific syntax and produce clean JavaScript. Follow these steps:

Type or paste your TypeScript code into the input box provided.
Click the "Convert" button to strip all type annotations, interfaces, and TypeScript-specific syntax.
View the clean JavaScript output in the output box, ready to use without a TypeScript compiler.

Example: Simple Function

TypeScript

// TypeScript
interface User {
  name: string;
  age: number;
}
function greet(user: User): string {
  return 'Hello, ' + user.name;
}

JavaScript

// JavaScript
function greet(user) {
  return 'Hello, ' + user.name;
}

How to Convert TypeScript to JavaScript

TypeScript compiles to JavaScript automatically during your build. But sometimes you need clean JavaScript output without a build step — for sharing snippets, using in environments without TypeScript support, or contributing to JS-only projects.

The TypeScript to JavaScript converter strips all type annotations, interfaces, and TypeScript-specific syntax from your code. Paste any TypeScript and get clean, runnable JavaScript output instantly.

Why Use a TypeScript to JavaScript Converter?

→Share TypeScript code in environments that do not support TypeScript
→Convert TypeScript examples to JavaScript for tutorials or documentation
→Migrate TypeScript code back to JavaScript for JS-only projects
→Quickly check what your TypeScript compiles to without running tsc

What the TypeScript to JavaScript Converter Strips

Type annotations (: string, : number)

Interface declarations

Type alias declarations

Generic type parameters (<T>

Type assertions (as Type)

Non-null assertions (!)

readonly modifiers

Access modifiers (public, private, protected)

Enum to value conversion

Decorator syntax

Parameter properties (constructor(public x))

namespace and module declarations

Frequently Asked Questions

What does TypeScript to JavaScript conversion do?

It strips all TypeScript-specific syntax: type annotations, interfaces, type aliases, generic parameters, access modifiers (public/private/protected/readonly), and non-null assertions (!). The logic and variable names stay identical — the output is clean JavaScript that runs without a TypeScript compiler.

When would I need to convert TypeScript to JavaScript?

Common reasons: using TS code in an environment that doesn't support TypeScript, sharing a snippet with a JS-only project, quickly previewing the compiled output without running tsc, or migrating away from TypeScript.

Is the output equivalent to tsc --noEmit output?

For most code, yes. The AI removes the same type-only constructs that the TypeScript compiler erases. Complex type-only imports (import type) are also removed.

Is the tool free?

Yes, completely free with no account required.

Does JS2TS store my code?

No. Conversions are processed in real time and never stored on our servers.

How do I convert TypeScript to JavaScript?

Run tsc in your project to compile TypeScript to JavaScript. Or paste your TypeScript code into the converter and get JavaScript output instantly — no build tool required.

Does TypeScript to JavaScript conversion change runtime behavior?

No. TypeScript types are erased at compile time — they have zero runtime impact. The JavaScript output behaves identically to the TypeScript source.

What happens to TypeScript enums when compiled to JavaScript?

TypeScript enums compile to JavaScript objects. A const enum inlines the values and produces no JavaScript. A regular enum produces a bidirectional mapping object: {0: "Up", Up: 0}.

Can I convert TypeScript files (.ts) to JavaScript (.js) files?

Yes. The converter produces JavaScript-equivalent code you can save as .js files. For a full project, use tsc --outDir ./dist which compiles all .ts files to .js in the output directory.

Does removing TypeScript types affect performance?

No. TypeScript types are compile-time only. The runtime JavaScript is identical whether you wrote it in TypeScript or plain JavaScript. TypeScript adds zero runtime overhead.