Is this JavaScript to TypeScript converter free?

Yes, SnipShift's JS to TypeScript converter is completely free with no signup required. Convert unlimited files directly in your browser.

Is my code sent to a server?

Your code is sent to our server for AI-powered type inference but is never stored. The conversion is processed in real-time and immediately discarded after generating your TypeScript output.

Does it handle React JSX to TSX conversion?

Yes! The converter fully supports JSX to TSX conversion including React component props typing, event handler types, ref types, and children prop inference.

What types does the AI infer?

The AI analyzes your code to infer primitive types, function signatures, React props and state, API response shapes, and complex generic types. It generates named interfaces rather than inline types for better readability.

Can I convert multiple files at once?

Currently the converter handles one file at a time. Paste your code, convert it, and copy the result. Each conversion is optimized for accuracy rather than batch processing.

JavaScript to TypeScript Converter

Convert your JavaScript and JSX code to fully-typed TypeScript and TSX instantly. Powered by AI for accurate type inference and named interfaces.

How It Works

Paste Your Code

Paste your JavaScript or JSX code into the input editor. Supports React components, Node.js modules, and more.

Click Convert

Our AI analyzes your code structure, infers types, creates interfaces, and produces clean TypeScript.

Copy & Use

Copy the converted TypeScript code or download it as a .ts/.tsx file. Ready to use in your project.

Why Convert to TypeScript

Catch Bugs Early

TypeScript catches type errors at compile time, before they reach production.

Better IDE Support

Get autocompletion, refactoring tools, and inline documentation in your editor.

Self-Documenting Code

Type annotations serve as living documentation for your codebase.

Safer Refactoring

Rename variables, move functions, and restructure code with confidence.

Supported Conversions

JS → TS

JSX → TSX

React

Node.js

FAQ

Is SnipShift free to use?

Yes, SnipShift is completely free with no signup required. Just paste your code and convert.

How accurate is the AI conversion?

SnipShift uses multiple AI models (Gemini, DeepSeek) for high-quality type inference. It creates named interfaces, proper React typing, and avoids using "any" types. Results are validated to ensure they parse as valid TypeScript.

Is my code stored or shared?

Conversion results are cached to improve performance, but your code is never stored permanently or shared with third parties. The cache automatically expires after 7 days.

What happens if AI models are unavailable?

SnipShift falls back to AST-based conversion which runs locally. While less sophisticated than AI conversion, it still handles import/export conversion, basic type inference, and JSDoc extraction.

Can I convert large files?

SnipShift supports files up to 50KB. For very large codebases, we recommend converting files individually or using tools like ts-migrate for bulk conversion.

Related Tools

Check out these other free developer converter tools from SnipShift:

JSON to TypeScriptGenerate TypeScript interfaces from JSON PropTypes to TypeScriptConvert React PropTypes to TypeScript interfaces HTML to JSXConvert HTML to valid JSX/TSX for React GraphQL to TypeScriptGenerate TypeScript types from GraphQL schemas