Strip TypeScript Types to JavaScript Online

Strip TypeScript Types to JavaScript

TypeScript adds static types that disappear at runtime. When you need plain JavaScript for bundlers, Node scripts, or quick experiments, manually deleting annotations is tedious. This converter removes TypeScript syntax and outputs clean JavaScript with JSX support.

What this tool does

Paste TypeScript or TSX source and receive JavaScript with interfaces, type aliases, and annotations removed. Pretty output mode produces readable code. Disable it when you need to preserve original line spacing for diff-friendly comparisons.

Related developer tools

To generate types from JSON samples, use the JSON to TypeScript POJO Generator. For Flow instead of TypeScript, try the Flow to JavaScript Converter or TypeScript to Flow when you need Flow annotations rather than plain JS.

Frequently Asked Questions

Does this compile TypeScript to older JavaScript?

No. This tool only removes type syntax. It does not downlevel modern JavaScript features such as optional chaining or async/await. Use a full TypeScript or Babel build pipeline for target environment compilation.

What is pretty output mode?

Pretty mode removes type tokens cleanly so the resulting JavaScript reads naturally. Without it, types are replaced with spaces to preserve original character positions.

Does this support TSX and JSX?

Yes. The parser accepts TypeScript with JSX syntax and keeps JSX elements in the output while stripping type annotations from props and variables.

Is my code uploaded anywhere?

No. Babel runs entirely in your browser. Your source code is not sent to a server.

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TypeScript To JavaScript