JavaScript to TypeScript Converter

Convert JavaScript source into a TypeScript-oriented draft using a bundled TypeScript compiler in your browser.

JavaScript source input

Processed locally in your browser.

Built by Sprint19. Product engineering for startups.

This tool converts source text in your browser using a bundled TypeScript compiler. It does not execute code or guarantee production-ready migration.

© 2026 Sprint19. Code licensed under MIT. Sprint19 name and branding may not be used without permission.