Js2Ts
Convert any Javascript code to Typescript. With AI.
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Js2Ts converts JavaScript code to TypeScript instantly using AI, free and no login required.
- for
- JavaScript developers who want to migrate to TypeScript quickly.
- pricing
- free
Key features
- One-click conversion — Paste JavaScript and click Convert to get fully typed TypeScript output.
- Type inference — AI infers parameter, return, object, array, union, intersection and generic types.
- React & Node support — Handles JSX/TSX props, hooks and Node.js module exports.
- No runtime overhead — Generated TypeScript compiles to plain JavaScript with types stripped.
- No account needed — Free, unlimited conversions without login or credit card.
- Privacy-first — Code is processed in real time and never stored on servers.
Use cases
- Migrate a legacy JavaScript library to TypeScript for better type safety
- Add typed props to existing React components without manual refactoring
- Generate TypeScript definitions for Node.js modules to improve IDE autocomplete
- Quickly prototype TypeScript interfaces from ad-hoc JavaScript snippets
Js2Ts FAQ
Is Js2Ts free to use?+
Yes, Js2Ts is completely free with no account, login, or credit card required.
How does the conversion work?+
You paste JavaScript code, click Convert, and the AI adds type annotations, interfaces and generics automatically.
Does Js2Ts store my code?+
No, conversions are processed in real time and your code is never stored or logged on the servers.
Can it handle large files?+
Yes, it can process large files; for very big codebases you may paste sections incrementally.
Does it work with React and Node.js code?+
Yes, it converts JSX to TSX with typed props and handles Node.js modules, async patterns and ES6+ syntax.
Summarized by DevHunt from js2ts.com · Oct 4, 2026. Details may change; check the official site.
