TypeScript to Plain JavaScript Converter
Paste TypeScript source to instantly strip out its types and produce plain, runnable JavaScript using the TypeScript compiler's own type-stripping. Free online developer tool.
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Free TypeScript to Plain JavaScript Converter
Paste TypeScript source to instantly strip out its types and produce plain, runnable JavaScript — using the TypeScript compiler's own type-stripping, so the result is exact, not an approximation.
How to Use It
Paste any TypeScript source into the input box, or click "Load Example." The tool runs it through the TypeScript compiler's transpileModule API targeting modern ES2020 output, which removes type annotations, interfaces, and type-only imports while leaving your actual runtime logic untouched.
Example
Given function greet(name: string): string { return `Hello, ${name}`; }, the tool emits function greet(name) { return `Hello, ${name}`; } — the parameter and return type annotations are gone, and the function body is unchanged.
Common Use Cases
- Quickly checking what a TypeScript snippet compiles down to at runtime.
- Producing a plain-JS version of a small utility to paste into an environment without a build step.
- Stripping types from a one-off script before running it in a plain Node or browser context.
FAQs
Is this an approximation, or does it produce exact output?
It's exact — this tool runs the real TypeScript compiler's transpileModulefunction, the same type-stripping logic TypeScript itself uses, rather than a hand-written or best-effort approximation.
Does this type-check my code first?
No — transpileModule transpiles a single file in isolation without full type-checking, so it will happily strip types from code that wouldn't actually pass tsc. If you need full type-checking, run your project through your normal TypeScript build instead.
Is my TypeScript uploaded anywhere?
No — transpilation happens entirely client-side in your browser, using the TypeScript compiler loaded on demand. Nothing you paste is sent to a server.