JS2TS

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Tagline:Convert JavaScript to TypeScript with AI in seconds

Updated:September 10, 2026

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Coding & Development AI Developer Tools AI Code Generator AI Code Assistant Free For Developers Web App Cloud-based Real-time Privacy-Focused Zero Setup

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What is JS2TS?

JS2TS is a free online converter that transforms JavaScript code into production-ready TypeScript with inferred types, interfaces, and generics. Conversions run in real time without storing code on servers, supporting ES6+ syntax, CommonJS, and React JSX.

How to use JS2TS?

1. Paste your JavaScript or JSX code into the input editor. 2. Click the Convert button to generate TypeScript with type annotations. 3. Review the inferred interfaces, types, and generics. 4. Copy the generated TypeScript code into your project.

JS2TS Core Features

Automatic Type Inference

Infers static types from variable usage, function parameters, and return statements automatically.

Interface and Generics Generation

Creates structured object interfaces, generic parameters, and union or intersection types from code patterns.

React & Module Support

Converts React JSX components into TSX with typed props, and handles CommonJS and ESModule imports and exports.

Zero Data Retention

Processes conversions in real time in memory; code is never stored or logged on servers.

JS2TS Use Cases

Migrating legacy JavaScript codebases to TypeScript without manual type authoring

Converting React JSX components to typed TSX with prop interfaces

Generating TypeScript interfaces and type definitions from API response objects

JS2TS Frequently Asked Questions

What is a JavaScript to TypeScript converter?

A JavaScript to TypeScript converter is a tool that automatically adds static type annotations to existing JavaScript code. It converts JS files to TS by inferring types from usage patterns and adding explicit type declarations, interfaces, and generics.

Is this JS to TS converter free?

Yes, JS2TS is completely free. No account, login, or credit card is required. Paste JavaScript code, click Convert, and copy the typed TypeScript output instantly with unlimited conversions.

Does JS2TS store my code?

No. Conversions are processed in real time and your code is never stored or logged on servers. Your code stays private.

What TypeScript patterns does the converter support?

The AI converter handles function parameter and return types, object interfaces, array types, union and intersection types, generics, class definitions with typed properties, async/await return types, and module exports.

JS2TS Product Background & Official Links

JS2TS Support Email & Customer service contact & Refund contact etc.

JS2TS Support Email: info@bytequests.com

More Contact, visit the about us page(https://js2ts.com)

JS2TS Pricing & Plans

Free

Unlimited JavaScript to TypeScript conversions
Automatic interface and generics generation
React JSX to TSX conversion support
No account or credit card required
Zero code retention on servers

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JS2TS Tags

Free For Developers Web App Cloud-based Real-time Privacy-Focused Zero Setup

Best Suited Occupations for JS2TS

Software Developers Indie Hackers Students