Js2TS is a browser-based converter that uses AI and ChatGPT to turn JavaScript into TypeScript in seconds. It helps reduce manual typing work and supports teams migrating to TypeScript or maintaining mixed JS/TS codebases.
How it works
- Paste your JavaScript into the input field
- Click “Convert”
- The model analyzes the code structure and generates TypeScript with inferred types, interfaces, and annotations
- Copy the result into your editor
Who it’s for
- Frontend and backend developers moving code to TypeScript
- Tech leads improving type safety in existing projects
- Students learning TypeScript through real code examples
Why use it
- Runs entirely in the browser with no installation or setup
- Produces immediate output you can review and refine
- Useful for refactoring, legacy code updates, and gradual adoption of stricter typing
